Addresses on 21st in Gary Indiana
- 1000 E 21st Ave
- 1000 E 21st Ave
- 1000 W 21st Pl
- 1001 E 21st Ave
- 1001 W 21st Ave
- 1005 W 21st Ave
- 1007 W 21st Ave
- 1009 W 21st Ave
- 1011 W 21st Ave
- 1013 W 21st Ave
- 1015 W 21st Ave
- 1016 W 21st Pl
- 1017 W 21st Pl
- 1022 E 21st Ave
- 1100 W 21st Pl
- 1101 E 21st Ave
- 1101 W 21st Ave
- 1101 W 21st Pl
- 1104 W 21st Pl
- 1105 E 21st Ave
- 1105 W 21st Ave
- 1105 W 21st Pl
- 1106 W 21st Pl
- 1107 W 21st Ave
- 1108 W 21st Pl
- 1109 W 21st Ave
- 1109 W 21st Pl
- 1110 W 21st Ave
- 1110 W 21st Pl
- 1111 W 21st Pl
- 1112 W 21st Pl
- 1113 E 21st Ave
- 1113 W 21st Ave
- 1113 W 21st Pl
- 1114 W 21st Pl
- 1115 W 21st Ave
- 1115 W 21st Pl
- 1116 W 21st Pl
- 1117 W 21st Ave
- 1117 W 21st Pl
- 1121 W 21st Ave
- 1125-27 E 21st Ave
- 1129-31 E 21st Ave
- 1135 E 21st Ave
- 120 E 21st Ave
- 1200 E 21st Ave
- 1200-02 W 21st Ave
- 1201 W 21st Ave
- 1201-03 E 21st Ave
- 1204-06 W 21st Ave
- 1205-07 E 21st Ave
- 1206 E 21st Ave
- 1208 W 21st Ave
- 1209 W 21st Ave
- 1209-11 E 21st Ave
- 1210-12 E 21st Ave
- 1213-15 E 21st Ave
- 1214 E 21st Ave
- 1217 W 21st Ave
- 1217-19 E 21st Ave
- 1218-20 E 21st Ave
- 1220 W 21st Ave
- 1221-23 E 21st Ave
- 1224 E 21st Ave
- 1224-26 W 21st Ave
- 1225-27 E 21st Ave
- 1226 E 21st Ave
- 1228-34 W 21st Ave
- 1229-31 E 21st Ave
- 1230 E 21st Ave
- 1233-35 E 21st Ave
- 1234 E 21st Ave
- 1237-39 E 21st Ave
- 1242 E 21st Ave
- 124-28 E 21st Ave
- 1246 W 21st Ave
- 1252-54 W 21st Ave
- 1256 W 21st Ave
- 1258 W 21st Ave
- 1264-66 W 21st Ave
- 1268-70 W 21st Ave
- 1276 W 21st Ave
- 1280 W 21st Ave
- 1288-90 W 21st Ave
- 1292 W 21st Ave
- 1292 W 21st Ave
- 1300-04 E 21st Ave
- 1301 W 21st Ave
- 1301 W 21st Ave
- 1312 E 21st Ave
- 1317-19 E 21st Ave
- 1318-20 E 21st Ave
- 1321 W 21st Ave
- 1321-23 E 21st Ave
- 1324 E 21st Ave
- 1330-32 E 21st Ave
- 1333 W 21st Ave
- 1334 E 21st Ave
- 1400 W 21st Ave
- 1400-02 E 21st Ave