Union County, South Dakota
Union County profile, demographic data, and geographic information.
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
GUS Population: 17,402 (2024)
ID: 205378
|
County | Official County Government |
Contact: CHAIRMAN OF BOARD
209 E MAIN ST, STE 200, ELK POINT SD 57025-2327
|
|
TOWNSHIP OF BIG SIOUX
GUS Population: 5,145 (2024)
ID: 134780
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
4040 N SHAMROCK RD, NORTH SIOUX CITY SD 57049-3018
|
|
GUS Population: 3,059 (2024)
ID: 209492
|
Municipal | Municipal Government Within County |
Contact: MAYOR
504 RIVER DR, NORTH SIOUX CITY SD 57049-3007
|
|
GUS Population: 2,087 (2024)
ID: 134604
|
Municipal | Municipal Government Within County |
Contact: FINANCE OFFICER
PO BOX 426, ELK POINT SD 57025-0426
|
|
CITY OF ELK POINT
GUS Population: 2,074 (2024)
ID: 209491
|
Municipal | Municipal Government Within County |
Contact: MAYOR
PO BOX 280, ELK POINT SD 57025-0280
|
|
TOWNSHIP OF JEFFERSON
GUS Population: 1,209 (2024)
ID: 225752
|
Township | Municipal Government Within County |
Contact: CLERK
32804 480TH AVE, JEFFERSON SD 57038-6874
|
|
CITY OF ALCESTER
GUS Population: 772 (2024)
ID: 113012
|
Municipal | Municipal Government Within County |
Contact: FINANCE OFFICER
PO BOX 318, ALCESTER SD 57001-0318
|
|
CITY OF JEFFERSON
GUS Population: 449 (2024)
ID: 175122
|
Municipal | Municipal Government Within County |
Contact: MAYOR
PO BOX 276, JEFFERSON SD 57038-0276
|
|
TOWNSHIP OF CIVIL BEND
GUS Population: 344 (2024)
ID: 175650
|
Township | Municipal Government Within County |
Contact: BETH REESE-CLERK
33163 478TH AVENUE, JEFFERSON SD 57038-6818
|
|
TOWNSHIP OF ALCESTER
GUS Population: 307 (2024)
ID: 175648
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
47879 300TH ST, ALCESTER SD 57001-6116
|
|
TOWNSHIP OF ELK POINT
GUS Population: 283 (2024)
ID: 113176
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
42445 480TH AVE, ELK POINT SD 57025
|
|
TOWNSHIP OF BIG SPRINGS
GUS Population: 277 (2024)
ID: 175649
|
Township | Municipal Government Within County |
Contact: CHAIRMAN
30749 478TH AVE, ALCESTER SD 57001-6328
|
|
TOWNSHIP OF VIRGINIA
GUS Population: 271 (2024)
ID: 113177
|
Township | Municipal Government Within County |
Contact: CLERK
30651 RIVER RD, HAWARDEN IA 51023-8038
|
|
GUS Population: 267 (2024)
ID: 134778
|
Township | Municipal Government Within County |
Contact: CLERK
47568 SD HIGHWAY 50, ELK POINT SD 57025-6646
|
|
TOWNSHIP OF PRAIRIE
GUS Population: 254 (2024)
ID: 134779
|
Township | Municipal Government Within County |
Contact: SUPERVISOR
47543 298TH ST, ALCESTER SD 57001-6705
|
|
TOWNSHIP OF SIOUX VALLEY
GUS Population: 245 (2024)
ID: 175652
|
Township | Municipal Government Within County |
Contact: CHAIRMAN
4737 312 ST, AKRON IA 51001
|
|
TOWNSHIP OF EMMET
GUS Population: 243 (2024)
ID: 175651
|
Township | Municipal Government Within County |
Contact: CLERK
30320 470TH AVE, BERESFORD SD 57004-6921
|
|
TOWNSHIP OF SPINK
GUS Population: 232 (2024)
ID: 194089
|
Township | Municipal Government Within County |
Contact: CLERK
31435 473RD AVE, ELK POINT SD 57025-6411
|