[3] Name on the Register [4] Image Date listed [5] Location City or town Description 1 Walter Allman House Walter Allman House December 27, 2010 (# 10001077 ) 102 S. East St. 41°25′04″N 87°21′43″W / 41.417778°N 87.362078°W / 41.417778; -87.362078 (Walter Allman House ) Crown Point 2 American Sheet and Tin Mill Apartment Building American Sheet and Tin Mill Apartment Building June 17, 2009 (# 09000427 ) 633 W. 4th Ave. 41°36′13″N 87°20′44″W / 41.603611°N 87.345556°W / 41.603611; -87.345556 (American Sheet and Tin Mill Apartment Building ) Gary 3 Louis J. Bailey Branch Library-Gary International Institute Louis J. Bailey Branch Library-Gary International Institute September 29, 2004 (# 04001102 ) 1501 S. Madison St. 41°35′16″N 87°20′29″W / 41.587778°N 87.341389°W / 41.587778; -87.341389 (Louis J. Bailey Branch Library-Gary International Institute ) Gary 4 James Brannon House James Brannon House March 21, 2011 (# 11000120 ) 260 Burnham St. 41°17′42″N 87°24′53″W / 41.295000°N 87.414722°W / 41.295000; -87.414722 (James Brannon House ) Lowell 5 Buckley Homestead Buckley Homestead December 6, 1984 (# 84000503 ) 3606 Belshaw Rd., southeast of Lowell 41°16′53″N 87°22′43″W / 41.281389°N 87.378611°W / 41.281389; -87.378611 (Buckley Homestead ) Cedar Creek Township 6 Wellington A. Clark House Wellington A. Clark House June 6, 2001 (# 01000619 ) 227 S. Court St. 41°24′57″N 87°21′57″W / 41.415722°N 87.365833°W / 41.415722; -87.365833 (Wellington A. Clark House ) Crown Point 7 Combs Addition Historic District Combs Addition Historic District September 30, 2014 (# 14000805 ) 400 and 500 blocks of Rutledge and Ellsworth Sts., and the 500 block of Marshall St. between 4th and 6th Aves. 41°36′10″N 87°22′10″W / 41.602778°N 87.369444°W / 41.602778; -87.369444 (Combs Addition Historic District ) Gary 8 Crawford-Winslow House Crawford-Winslow House June 25, 2013 (# 13000422 ) 357 S. Main St. 41°24′47″N 87°21′53″W / 41.413194°N 87.364722°W / 41.413194; -87.364722 (Crawford-Winslow House ) Crown Point 9 Crown Point Courthouse Square Historic District Crown Point Courthouse Square Historic District March 22, 2004 (# 04000203 ) Roughly bounded by Clark St., the alley east of Main St., Hack Ct., and Court St.; also roughly bounded by Robinson, East, Walnut, and Court Sts.; also 208 Main St. 41°25′02″N 87°21′56″W / 41.417333°N 87.365456°W / 41.417333; -87.365456 (Crown Point Courthouse Square Historic District ) Crown Point Second set of boundaries represents a boundary adjustment of December 8, 2005 ; 208 Main represents a boundary increase of March 29, 2007 10 Morse Dell Plain House and Garden Morse Dell Plain House and Garden April 1, 1998 (# 98000298 ) 7109 Knickerbocker Parkway 41°35′03″N 87°28′39″W / 41.584167°N 87.4775°W / 41.584167; -87.4775 (Morse Dell Plain House and Garden ) Hammond 11 Ralph Waldo Emerson School Ralph Waldo Emerson School June 9, 1995 (# 95000702 ) 716 E. 7th Ave. 41°35′57″N 87°19′39″W / 41.599167°N 87.3275°W / 41.599167; -87.3275 (Ralph Waldo Emerson School ) Gary 12 Eskilson Historic District Eskilson Historic District March 26, 2014 (# 14000073 ) Roughly bounded by W. 3rd Ave. and the alleys between Garfield and Hayes Sts., W. 4th Pl., and W. 5th Ave., Cleveland St., and McKinley St. 41°36′13″N 87°21′37″W / 41.603611°N 87.360278°W / 41.603611; -87.360278 (Eskilson Historic District ) Gary 13 First Unitarian Church of Hobart First Unitarian Church of Hobart September 9, 1999 (# 99001112 ) 497 Main St. 41°31′48″N 87°15′11″W / 41.530000°N 87.253056°W / 41.530000; -87.253056 (First Unitarian Church of Hobart ) Hobart 14 Forest-Ivanhoe Residential Historic District Forest-Ivanhoe Residential Historic District March 31, 2010 (# 10000124 ) Roughly bounded by 172nd Pl., the eastern side of Forest Ave. south to its end, and the Little Calumet River 41°34′51″N 87°31′25″W / 41.580931°N 87.523533°W / 41.580931; -87.523533 (Forest-Ivanhoe Residential Historic District ) Hammond 15 Forest-Moraine Residential Historic District Forest-Moraine Residential Historic District September 23, 2010 (# 10000777 ) Roughly bounded by Wildwood Rd., 165th St., Hohman Ave. and State Line Ave. 41°35′53″N 87°31′24″W / 41.598056°N 87.523333°W / 41.598056; -87.523333 (Forest-Moraine Residential Historic District ) Hammond 16 Forest-Southview Residential Historic District Forest-Southview Residential Historic District September 23, 2010 (# 10000778 ) Roughly bounded by 165th St., Hohman Ave., Locust St. and State Line Ave. 41°35′37″N 87°31′25″W / 41.593611°N 87.523611°W / 41.593611; -87.523611 (Forest-Southview Residential Historic District ) Hammond 17 Gary Bathing Beach Aquatorium Gary Bathing Beach Aquatorium November 25, 1994 (# 94001354 ) One Marquette Dr., Marquette Park 41°37′11″N 87°15′24″W / 41.619722°N 87.256667°W / 41.619722; -87.256667 (Gary Bathing Beach Aquatorium ) Gary 18 Gary City Center Historic District Gary City Center Historic District November 25, 1994 (# 94001352 ) Roughly Broadway from the Chicago SouthShore and South Bend railroad tracks to 9th Ave. 41°36′01″N 87°20′13″W / 41.600278°N 87.336944°W / 41.600278; -87.336944 (Gary City Center Historic District ) Gary 19 Gary Land Company Building Gary Land Company Building May 8, 1979 (# 79000021 ) 4th Ave. and Massachusetts St. 41°36′15″N 87°20′09″W / 41.604167°N 87.335833°W / 41.604167; -87.335833 (Gary Land Company Building ) Gary 20 Gary Public Schools Memorial Auditorium Gary Public Schools Memorial Auditorium November 25, 1994 (# 94001353 ) 700-734 Massachusetts St. 41°35′53″N 87°20′10″W / 41.598056°N 87.336111°W / 41.598056; -87.336111 (Gary Public Schools Memorial Auditorium ) Gary 21 Gary Union Station Gary Union Station June 6, 2019 (# 100004040 ) 251 N. Broadway 41°36′20″N 87°20′13″W / 41.6056°N 87.3370°W / 41.6056; -87.3370 (Gary Union Station ) Gary 22 Glendale Park Historic District Glendale Park Historic District June 25, 2013 (# 13000423 ) 17-64 Glendale Parkway 41°36′07″N 87°31′24″W / 41.601944°N 87.523333°W / 41.601944; -87.523333 (Glendale Park Historic District ) Hammond 23 E.J. and E. Griffith Interlocking Tower E.J. and E. Griffith Interlocking Tower September 28, 2003 (# 03000980 ) 201 S. Broad St. 41°31′16″N 87°25′39″W / 41.521111°N 87.4275°W / 41.521111; -87.4275 (E.J. and E. Griffith Interlocking Tower ) Griffith 24 Griffith Grand Trunk Depot Griffith Grand Trunk Depot September 28, 2003 (# 03000985 ) 201 S. Broad St. 41°31′16″N 87°25′39″W / 41.521111°N 87.4275°W / 41.521111; -87.4275 (Griffith Grand Trunk Depot ) Griffith 25 Griffith State Bank Upload image June 3, 2019 (# 100004050 ) 101 E. Main St. 41°31′22″N 87°25′39″W / 41.5228°N 87.4276°W / 41.5228; -87.4276 (Griffith State Bank ) Griffith 26 Melvin A. Halsted House Melvin A. Halsted House December 8, 1978 (# 78000037 ) 201 E. Main St. 41°17′36″N 87°25′21″W / 41.293333°N 87.422389°W / 41.293333; -87.422389 (Melvin A. Halsted House ) Lowell 27 Hansen Branch-Hammond Public Library Upload image November 29, 2019 (# 100004719 ) 2823 Martha St., 6736 Alabama Ave. 41°35′26″N 87°27′38″W / 41.5906°N 87.4606°W / 41.5906; -87.4606 (Hansen Branch-Hammond Public Library ) Hammond 28 Hobart Carnegie Library Hobart Carnegie Library July 15, 1982 (# 82000047 ) 706 E. 4th St. 41°31′55″N 87°15′07″W / 41.532083°N 87.251944°W / 41.532083; -87.251944 (Hobart Carnegie Library ) Hobart 29 Hobart Commercial District Hobart Commercial District December 16, 2014 (# 14001037 ) Roughly bounded by Lake George, the Norfolk Southern rail line, and Center and 2nd Sts.. 41°31′55″N 87°15′17″W / 41.531944°N 87.254722°W / 41.531944; -87.254722 (Hobart Commercial District ) Hobart 30 Hobart First Methodist Episcopal Church Hobart First Methodist Episcopal Church December 7, 2017 (# 100001880 ) 650 and 654 E. 4th St. 41°31′55″N 87°15′08″W / 41.531944°N 87.252222°W / 41.531944; -87.252222 (Hobart First Methodist Episcopal Church ) Hobart 31 Hohman Avenue Commercial Historic District Hohman Avenue Commercial Historic District March 21, 2011 (# 11000118 ) Approximately three blocks lining Hohman Ave. between Clinton St. and Rimbach St. 41°37′02″N 87°31′19″W / 41.617222°N 87.521944°W / 41.617222; -87.521944 (Hohman Avenue Commercial Historic District ) Hammond 32 Hoosier Theater Building Hoosier Theater Building February 18, 1987 (# 87000069 ) 1329-1335 119th St. 41°40′46″N 87°29′47″W / 41.679444°N 87.496389°W / 41.679444; -87.496389 (Hoosier Theater Building ) Whiting 33 Ibach House Ibach House December 27, 2010 (# 10001078 ) 1908 Ridge Rd. 41°33′26″N 87°28′56″W / 41.557222°N 87.482222°W / 41.557222; -87.482222 (Ibach House ) Munster 34 Indi-Illi Park Historic District Indi-Illi Park Historic District June 15, 2012 (# 12000335 ) Roughly bounded by Locust and 169th Sts., and Hohman and State Line Aves. 41°35′24″N 87°31′28″W / 41.590000°N 87.524444°W / 41.590000; -87.524444 (Indi-Illi Park Historic District ) Hammond 35 Indiana Harbor Public Library Indiana Harbor Public Library September 15, 2005 (# 05001014 ) 3605 Grand Ave. 41°38′51″N 87°26′58″W / 41.647500°N 87.449444°W / 41.647500; -87.449444 (Indiana Harbor Public Library ) East Chicago 36 Jackson-Monroe Terraces Historic District Jackson-Monroe Terraces Historic District June 17, 2009 (# 09000428 ) 404-423 Jackson St. and 408-426 Monroe St. 41°36′12″N 87°20′39″W / 41.603333°N 87.344167°W / 41.603333; -87.344167 (Jackson-Monroe Terraces Historic District ) Gary 37 Jefferson Street Historic District Jefferson Street Historic District September 18, 2013 (# 13000723 ) Roughly bounded by Washington St. and 37th, 35th, Jefferson, and Madison Aves. 41°33′10″N 87°20′21″W / 41.552778°N 87.339167°W / 41.552778; -87.339167 (Jefferson Street Historic District ) Gary 38 Francis P. Keilman House Francis P. Keilman House March 20, 2013 (# 13000084 ) 9260 Patterson St. 41°27′03″N 87°28′17″W / 41.450750°N 87.471389°W / 41.450750; -87.471389 (Francis P. Keilman House ) St. John 39 Kingsbury-Doak Farmhouse Kingsbury-Doak Farmhouse September 15, 2005 (# 05001013 ) 4411 E. 153rd Ave., west of Hebron 41°20′20″N 87°17′11″W / 41.338889°N 87.286389°W / 41.338889; -87.286389 (Kingsbury-Doak Farmhouse ) Eagle Creek Township 40 Knights of Columbus Building Knights of Columbus Building March 1, 1984 (# 84001065 ) 333 W. 5th Ave. 41°36′06″N 87°20′30″W / 41.601667°N 87.341667°W / 41.601667; -87.341667 (Knights of Columbus Building ) Gary 41 Lake County Courthouse Lake County Courthouse May 17, 1973 (# 73000073 ) Public Sq. 41°25′02″N 87°21′57″W / 41.417222°N 87.365833°W / 41.417222; -87.365833 (Lake County Courthouse ) Crown Point 42 Lake County Tuberculosis Sanatorium, Nurses Home and Superintendent's House Lake County Tuberculosis Sanatorium, Nurses Home and Superintendent's House June 17, 2005 (# 05000608 ) 2323 N. Main St. and 425 W. 93rd Ave. 41°27′04″N 87°21′55″W / 41.451111°N 87.365278°W / 41.451111; -87.365278 (Lake County Tuberculosis Sanatorium, Nurses Home and Superintendent's House ) Crown Point 427 W. 93rd represents a boundary increase of January 9, 2013 43 Lake County Sheriff's House and Jail Lake County Sheriff's House and Jail January 4, 1989 (# 88003039 ) 232 S. Main St. 41°24′56″N 87°21′51″W / 41.415556°N 87.364167°W / 41.415556; -87.364167 (Lake County Sheriff's House and Jail ) Crown Point 44 Lassen Hotel Lassen Hotel July 7, 1981 (# 81000019 ) 7808 W. 138th Pl. 41°22′06″N 87°25′30″W / 41.368333°N 87.425°W / 41.368333; -87.425 (Lassen Hotel ) Cedar Lake 45 Lincoln Street Historic District Lincoln Street Historic District December 31, 2013 (# 13001012 ) Roughly bounded by Fillmore and Hayes Sts. and 6th and 8th Aves. 41°35′57″N 87°21′17″W / 41.599167°N 87.354722°W / 41.599167; -87.354722 (Lincoln Street Historic District ) Gary 46 Lowell Commercial Historic District Lowell Commercial Historic District March 26, 2003 (# 03000144 ) 305-519 Commercial Ave. and 108-110 Clark St. 41°17′30″N 87°25′23″W / 41.291667°N 87.423056°W / 41.291667; -87.423056 (Lowell Commercial Historic District ) Lowell 47 Albert Maack House Albert Maack House June 23, 2011 (# 11000383 ) 498 S. Court St. 41°24′34″N 87°21′58″W / 41.409444°N 87.366111°W / 41.409444; -87.366111 (Albert Maack House ) Crown Point 48 Horace Mann Historic District Horace Mann Historic District September 18, 2013 (# 13000722 ) Roughly bounded by W. 5th, 8th, and 7th Aves., and Cleveland and Roosevelt Sts. 41°36′00″N 87°21′47″W / 41.600000°N 87.363056°W / 41.600000; -87.363056 (Horace Mann Historic District ) Gary 49 Marktown Historic District Marktown Historic District February 20, 1975 (# 75000025 ) Bounded by Pine, Riley, Dickey, and 129th Sts. 41°39′31″N 87°28′04″W / 41.658611°N 87.467778°W / 41.658611; -87.467778 (Marktown Historic District ) East Chicago 50 MATERIAL SERVICE (shipwreck) MATERIAL SERVICE (shipwreck) March 25, 2014 (# 14000074 ) Lake Michigan , northeast of Calumet Harbor [6] 41°44′33″N 87°30′23″W / 41.742500°N 87.506389°W / 41.742500; -87.506389 (MATERIAL SERVICE (shipwreck) ) North Township 51 Joseph Ernest Meyer House Joseph Ernest Meyer House March 1, 1984 (# 84001068 ) 1370 Joliet St. 41°29′26″N 87°29′48″W / 41.490556°N 87.496667°W / 41.490556; -87.496667 (Joseph Ernest Meyer House ) Dyer 52 Miller Town Hall Miller Town Hall July 7, 1978 (# 78000038 ) Junction of Miller Ave., Old Hobart Rd., and Grand Boulevard 41°36′02″N 87°15′41″W / 41.600556°N 87.261389°W / 41.600556; -87.261389 (Miller Town Hall ) Gary 53 Monon Park Dancing Pavilion Monon Park Dancing Pavilion January 3, 2001 (# 00001540 ) 13701 Lauerman St. 41°22′07″N 87°26′22″W / 41.368611°N 87.439444°W / 41.368611; -87.439444 (Monon Park Dancing Pavilion ) Cedar Lake 54 Monroe Terrace Historic District Monroe Terrace Historic District June 17, 2009 (# 09000429 ) 304-318 Monroe St. 41°36′19″N 87°20′37″W / 41.605278°N 87.343611°W / 41.605278; -87.343611 (Monroe Terrace Historic District ) Gary 55 Morgan-Skinner-Boyd Homestead Morgan-Skinner-Boyd Homestead December 27, 2010 (# 10001079 ) 111 E. 73rd Ave. 41°29′08″N 87°20′02″W / 41.485556°N 87.333889°W / 41.485556; -87.333889 (Morgan-Skinner-Boyd Homestead ) Merrillville 56 Morningside Historic District Morningside Historic District September 24, 2009 (# 09000758 ) Roughly bounded by the eastern side of Washington, the western side of Jefferson, and 45th and 47th Sts. 41°32′05″N 87°20′22″W / 41.534722°N 87.339444°W / 41.534722; -87.339444 (Morningside Historic District ) Gary 57 Carolyn Mosby Senior High Rise Upload image May 24, 2022 (# 100007736 ) 650 Jackson St. 41°35′56″N 87°20′41″W / 41.5988°N 87.3447°W / 41.5988; -87.3447 (Carolyn Mosby Senior High Rise ) Gary 57 Charles E. Nichols House Charles E. Nichols House June 24, 2010 (# 10000375 ) 231 W. Commercial Ave. 41°17′23″N 87°25′39″W / 41.289722°N 87.427444°W / 41.289722; -87.427444 (Charles E. Nichols House ) Lowell 58 North Gleason Park Community Building Upload image August 24, 2021 (# 100006843 ) 301 West 30th Ave. 41°33′49″N 87°20′27″W / 41.5636°N 87.3407°W / 41.5636; -87.3407 (North Gleason Park Community Building ) Gary 59 Northern States Life Insurance Company Northern States Life Insurance Company June 24, 2010 (# 10000376 ) 5935 Hohman Ave. 41°36′20″N 87°31′18″W / 41.605556°N 87.521667°W / 41.605556; -87.521667 (Northern States Life Insurance Company ) Hammond 60 Pennsylvania Railroad Station Pennsylvania Railroad Station March 1, 1984 (# 84001070 ) 1001 Lillian St. 41°32′04″N 87°14′50″W / 41.534444°N 87.247222°W / 41.534444; -87.247222 (Pennsylvania Railroad Station ) Hobart 61 Polk Street Concrete Cottage Historic District Polk Street Concrete Cottage Historic District September 15, 2011 (# 11000657 ) 604-614 Polk St. 41°35′59″N 87°21′00″W / 41.599722°N 87.350000°W / 41.599722; -87.350000 (Polk Street Concrete Cottage Historic District ) Gary 62 Polk Street Terraces Historic District Polk Street Terraces Historic District June 17, 2009 (# 09000430 ) 404-422 and 437-455 Polk St. 41°36′13″N 87°20′59″W / 41.603611°N 87.349722°W / 41.603611; -87.349722 (Polk Street Terraces Historic District ) Gary 63 Pullman-Standard Historic District Pullman-Standard Historic District April 10, 2012 (# 12000186 ) Roughly bounded by Columbia, Field, Porter, and Willard Aves. 41°36′17″N 87°29′53″W / 41.604637°N 87.498134°W / 41.604637; -87.498134 (Pullman-Standard Historic District ) Hammond 64 Theodore Roosevelt High School Theodore Roosevelt High School December 19, 2012 (# 12001059 ) 730 W. 25th St. 41°34′28″N 87°20′42″W / 41.574444°N 87.345000°W / 41.574444; -87.345000 (Theodore Roosevelt High School ) Gary 65 Roselawn-Forest Heights Historic District Roselawn-Forest Heights Historic District December 19, 2012 (# 12001060 ) Roughly bounded by Lawndale, 172nd Pl., and Hohman and State Line Aves. 41°35′12″N 87°31′26″W / 41.586667°N 87.523889°W / 41.586667; -87.523889 (Roselawn-Forest Heights Historic District ) Hammond 66 John Ross Farm John Ross Farm March 27, 1996 (# 96000283 ) 3815 E. U.S. Route 231 , northwest of Leroy 41°22′14″N 87°17′21″W / 41.370556°N 87.289167°W / 41.370556; -87.289167 (John Ross Farm ) Winfield Township 67 J. Claude Rumsey House J. Claude Rumsey House December 22, 2008 (# 08001211 ) 709 Michigan Ave. 41°17′44″N 87°25′00″W / 41.295556°N 87.416667°W / 41.295556; -87.416667 (J. Claude Rumsey House ) Lowell 68 Barney Sablotny House Barney Sablotny House December 19, 2012 (# 12001061 ) 501 W. 47th St. 41°31′59″N 87°20′33″W / 41.532917°N 87.342500°W / 41.532917; -87.342500 (Barney Sablotny House ) Gary 69 St. Augustine's Episcopal Church St. Augustine's Episcopal Church September 18, 2013 (# 13000758 ) 2425 W. 19th Ave. 41°35′03″N 87°22′05″W / 41.584167°N 87.368056°W / 41.584167; -87.368056 (St. Augustine's Episcopal Church ) Gary 70 St. John's Lutheran Church and School St. John's Lutheran Church and School December 3, 2019 (# 100004723 ) 2271 West 10th Ave. 41°35′35″N 87°21′57″W / 41.5930°N 87.3658°W / 41.5930; -87.3658 (St. John's Lutheran Church and School ) Gary 71 Henry and Caroline Schrage House Upload image May 13, 2021 (# 100006562 ) 2006 Schrage Ave. 41°40′36″N 87°29′23″W / 41.6768°N 87.4898°W / 41.6768; -87.4898 (Henry and Caroline Schrage House ) Whiting 72 Southmoor Apartment Hotel Southmoor Apartment Hotel March 21, 2011 (# 11000125 ) 5946 Hohman Ave. 41°36′19″N 87°31′20″W / 41.6053°N 87.5222°W / 41.6053; -87.5222 (Southmoor Apartment Hotel ) Hammond 73 Stallbohm Barn-Kaske House Stallbohm Barn-Kaske House April 1, 1998 (# 98000303 ) 1154 Ridge Rd. 41°33′35″N 87°30′01″W / 41.5597°N 87.5003°W / 41.5597; -87.5003 (Stallbohm Barn-Kaske House ) Munster 74 State Bank of Hammond Building State Bank of Hammond Building September 27, 1984 (# 84001072 ) 5444-5446 Calumet Ave. 41°36′51″N 87°30′33″W / 41.614250°N 87.5092°W / 41.614250; -87.5092 (State Bank of Hammond Building ) Hammond 75 State Street Commercial Historic District State Street Commercial Historic District September 17, 1999 (# 99001157 ) Roughly State St. between Sohl and Bulletin Ave. 41°37′07″N 87°31′00″W / 41.618611°N 87.516667°W / 41.618611; -87.516667 (State Street Commercial Historic District ) Hammond 76 Van Buren Terrace Historic District Van Buren Terrace Historic District June 22, 2007 (# 07000565 ) 336-354 Van Buren St. 41°36′17″N 87°20′47″W / 41.604722°N 87.346389°W / 41.604722; -87.346389 (Van Buren Terrace Historic District ) Gary 77 West Fifth Avenue Apartments Historic District West Fifth Avenue Apartments Historic District May 17, 1984 (# 84001076 ) Roughly 5th Ave. from Taft to Pierce St. 41°36′06″N 87°21′29″W / 41.601667°N 87.358056°W / 41.601667; -87.358056 (West Fifth Avenue Apartments Historic District ) Gary 78 William Whitaker Landscape and House William Whitaker Landscape and House September 9, 1999 (# 99001107 ) 472 S. Main St. 41°24′37″N 87°21′50″W / 41.410278°N 87.363889°W / 41.410278; -87.363889 (William Whitaker Landscape and House ) Crown Point 79 Whiting Memorial Community House Whiting Memorial Community House February 8, 1980 (# 80000044 ) 1938 Clark St. 41°40′41″N 87°29′47″W / 41.678056°N 87.496389°W / 41.678056; -87.496389 (Whiting Memorial Community House ) Whiting 80 George John Wolf House George John Wolf House June 21, 2007 (# 07000563 ) 7220 Forest Ave. 41°34′57″N 87°31′27″W / 41.582500°N 87.524167°W / 41.582500; -87.524167 (George John Wolf House ) Hammond 81 John Wood Old Mill John Wood Old Mill October 10, 1975 (# 75000026 ) East of central Merrillville on State Road 330 41°28′36″N 87°13′18″W / 41.476528°N 87.221667°W / 41.476528; -87.221667 (John Wood Old Mill ) Merrillville