Addresses on 21st Ave in Post Falls Idaho
- 103 W 21st Ave
- 107 W 21st Ave
- 110 W 21st Ave
- 111 W 21st Ave
- 116 W 21st Ave
- 120 W 21st Ave
- 204 W 21st Ave
- 209 W 21st Ave
- 212 W 21st Ave
- 215 W 21st Ave
- 303 W 21st Ave
- 305 E 21st Ave
- 307 E 21st Ave
- 309 W 21st Ave
- 309 E 21st Ave
- 310 W 21st Ave
- 311 E 21st Ave
- 311 W 21st Ave
- 312 W 21st Ave
- 313 E 21st Ave
- 313 W 21st Ave
- 314 W 21st Ave
- 315 W 21st Ave
- 315 W 21st Ave
- 315 W 21st Ave
- 315 E 21st Ave
- 403 W 21st Ave
- 403 E 21st Ave
- 404 E 21st Ave
- 408 W 21st Ave
- 408 W 21st Ave
- 408 W 21st Ave
- 409 W 21st Ave
- 409 E 21st Ave
- 415 E 21st Ave
- 416 E 21st Ave
- 420 W 21st Ave
- 503 E 21st Ave
- 510 E 21st Ave
- 515 E 21st Ave
- 516 E 21st Ave
- 521 E 21st Ave
- 527 E 21st Ave
- 533 E 21st Ave
- 603 E 21st Ave
- 605 E 21st Ave
- 607 E 21st Ave
- 609 E 21st Ave