Addresses on Highway 21 in Fort Mill South Carolina
- 1610 Highway 21 Byp
- 1610 Highway 21 Byp
- 1621 Highway 21 Byp
- 1635 Highway 21 Byp
- 1650 Highway 21 Byp
- 1718 Highway 21 Byp
- 1722 Highway 21 Byp
- 1730 Highway 21 Byp
- 1730 Highway 21 Byp
- 1736 Highway 21 Byp
- 1750 Highway 21 Byp
- 1922 Highway 21 Byp
- 1938 Highway 21 Byp
- 1950 Highway 21 Byp
- 1951 Highway 21 Byp
- 1975 Highway 21 Byp
- 2000 Highway 21 Byp
- 2014 Highway 21 Byp
- 2021 Highway 21 Byp
- 2089 Highway 21 Byp
- 215 Highway 21 Byp
- 2430 Highway 21 Byp
- 2488 Highway 21 Byp
- 255 Highway 21 Byp
- 2976 Highway 21
- 3008 Highway 21
- 3020 Highway 21
- 3023 Highway 21
- 3031 Highway 21
- 3064 Highway 21
- 3071 Highway 21
- 3080 Highway 21
- 311 Highway 21 Byp
- 311 Highway 21 Byp
- 3133 Highway 21
- 3139 Highway 21
- 315 Highway 21 Byp
- 315 Highway 21 Byp
- 3151 Highway 21
- 3151 Highway 21
- 3160 Highway 21
- 3186 Highway 21
- 3207 Highway 21
- 3215 Highway 21
- 3282 Highway 21
- 3302 Highway 21
- 3312 Highway 21
- 333 Highway 21 Byp
- 3361 Highway 21
- 3386 Highway 21
- 3400 Highway 21
- 3401 Highway 21
- 3420 Highway 21
- 3425 Highway 21
- 3425 Highway 21
- 3463 Highway 21
- 3471 Highway 21
- 3473 Highway 21
- 3475 Highway 21
- 3477 Highway 21
- 3480 Highway 21
- 3490 Highway 21
- 418 Highway 21 Byp
- 426 Highway 21 Byp
- 531 Highway 21 Byp
- 671 Highway 21 Byp
- 681 Highway 21 Byp