Addresses on 12th St in Alton Illinois
- 1 E 12th St
- 100 E 12th St
- 104 E 12th St
- 107 E 12th St
- 108 E 12th St
- 110 E 12th St
- 2 E 12th St
- 200 W 12th St
- 200 E 12th St
- 200 W 12th St
- 203 E 12th St
- 204 E 12th St
- 205 E 12th St
- 207 E 12th St
- 220 E 12th St
- 225 W 12th St
- 227 W 12th St
- 230 E 12th St
- 233 W 12th St
- 233 W 12th St
- 234 E 12th St
- 300 E 12th St
- 301 E 12th St
- 302 E 12th St
- 314 E 12th St
- 327 E 12th St
- 329 W 12th St
- 407 E 12th St
- 410 E 12th St
- 415 E 12th St
- 421 E 12th St
- 442 E 12th St
- 445 E 12th St
- 503 E 12th St
- 504 E 12th St
- 509 E 12th St
- 548 E 12th St
- 549 E 12th St
- 603 E 12th St
- 615 E 12th St
- 619 E 12th St