Addresses on 21st Ave in Brookings South Dakota
- 101 21st Ave
- 105 21st Ave
- 110 21st Ave
- 111 21st Ave
- 117 21st Ave
- 120 21st Ave
- 303 21st Ave
- 308 21st Ave
- 310 21st Ave
- 311 21st Ave
- 313 21st Ave
- 314 21st Ave
- 316 21st Ave
- 317 21st Ave
- 318 21st Ave
- 321 21st Ave
- 322 21st Ave
- 324 21st Ave
- 327 21st Ave
- 330 21st Ave
- 333 21st Ave
- 336 21st Ave
- 337 21st Ave
- 342 21st Ave
- 343 21st Ave
- 346 21st Ave
- 349 21st Ave
- 356 21st Ave
- 400 21st Ave
- 405 21st Ave
- 408 21st Ave
- 415 21st Ave
- 420 21st Ave