Addresses on 21st St in Rockford Illinois
- 1003 21st St
- 1004 21st St
- 1007 21st St
- 1008 21st St
- 1011 21st St
- 1012 21st St
- 1015 21st St
- 1016 21st St
- 1018 21st Ave
- 1019 21st St
- 1020 21st St
- 1023 21st St
- 1024 21st St
- 1025 21st Ave
- 10xx 21st St
- 1103 21st St
- 1104 21st St
- 1106 21st Ave
- 1107 21st St
- 1108 21st St
- 1111 21st St
- 1112 21st St
- 1114 21st Ave
- 1114 21st Pl
- 1115 21st Ave
- 1115 21st Pl
- 1115 21st St
- 1116 21st St
- 1118 21st Ave
- 1118 21st Pl
- 1119 21st Ave
- 1119 21st Pl
- 1119 21st St
- 1120 21st St
- 1122 21st Pl
- 1122 21st Pl
- 1123 21st Pl
- 1124 21st Ave
- 1124 21st Pl
- 1127 21st Pl
- 1127 21st Ave
- 1128 21st Ave
- 1128 21st Pl
- 1132 21st Ave
- 1133 21st Ave
- 1137 21st Ave
- 1138 21st Ave
- 1142 21st Ave
- 1203 21st St
- 1204 21st Ave
- 1204 21st St
- 1205 21st Pl
- 1205 21st Pl
- 1207 21st St
- 1208 21st St
- 1209 21st Pl
- 1209 21st Pl
- 1210 21st Ave
- 1211 21st St
- 1212 21st Ave
- 1212 21st St
- 1213 21st Pl
- 1215 21st St
- 1216 21st Ave
- 1216 21st St
- 1219 21st Pl
- 1219 21st Pl
- 1219 21st Pl
- 1219 21st Pl
- 1219 21st St
- 1220 21st Ave
- 1220 21st St
- 1223 21st Pl
- 1224 21st Ave
- 1224 21st St
- 1228 21st Ave
- 1242 21st Ave
- 1242 21st Ave
- 1303 21st St
- 1304 21st St
- 1307 21st St
- 1308 21st St
- 1311 21st St
- 1315 21st St
- 1319 21st St
- 1320 21st Ave
- 1321 21st Ave
- 1325 21st Ave
- 1340 21st St
- 13xx 21st Ave
- 1403 21st Ave
- 1403 21st St
- 1404 21st St
- 1407 21st St
- 1411 21st Ave
- 1411 21st St
- 1415 21st Ave
- 1440 21st St
- 1440 21st St
- 1440 21st St