FCC Data · Updated April 2026
South Dakota Internet Overview
897 Mbps avg · 375 ZIP codes · 100% fiber · 66 counties
897
Avg Mbps
100%
Fiber Access
10
Avg Providers
375
ZIP Codes
County Grade Distribution
A
56
B
8
C
1
D
1
F
0
Best Broadband Counties in South Dakota
| County | Grade | Avg Download | Fiber | ZIPs |
|---|---|---|---|---|
| Roberts | A | 1000 Mbps | 100% | 8 |
| Deuel | A | 1000 Mbps | 100% | 7 |
| Grant | A | 1000 Mbps | 100% | 10 |
| Clark | A | 1000 Mbps | 100% | 6 |
| Day | A | 1000 Mbps | 100% | 7 |
| Hamlin | A | 1000 Mbps | 100% | 5 |
| Marshall | A | 1000 Mbps | 100% | 6 |
| Davison | A | 1000 Mbps | 100% | 3 |
| Hanson | A | 1000 Mbps | 100% | 3 |
| Sanborn | A | 1000 Mbps | 100% | 3 |
| Miner | A | 1000 Mbps | 100% | 4 |
| Brule | A | 1000 Mbps | 100% | 3 |
| Buffalo | A | 1000 Mbps | 100% | 2 |
| Hyde | A | 1000 Mbps | 100% | 3 |
| Jerauld | A | 1000 Mbps | 100% | 2 |
Slowest Counties in South Dakota
| County | Grade | Avg Download | Fiber | ZIPs |
|---|---|---|---|---|
| Todd | D | 100 Mbps | 100% | 5 |
| Clay | C | 1000 Mbps | 100% | 3 |
| Jackson | B | 100 Mbps | 100% | 4 |
| Mellette | B | 100 Mbps | 100% | 4 |
| Oglala Lakota | B | 100 Mbps | 100% | 8 |
| Jones | B | 100 Mbps | 100% | 3 |
| Douglas | B | 1000 Mbps | 100% | 5 |
| Custer | B | 1000 Mbps | 100% | 4 |
| Charles Mix | B | 1000 Mbps | 100% | 7 |
| McCook | B | 1000 Mbps | 100% | 6 |
| Bennett | A | 100 Mbps | 100% | 3 |
| Turner | A | 1000 Mbps | 100% | 7 |
| Bon Homme | A | 1000 Mbps | 100% | 5 |
| Meade | A | 1000 Mbps | 100% | 14 |
| Lincoln | A | 1000 Mbps | 100% | 9 |
All 66 Counties in South Dakota
ARoberts
ADeuel
AGrant
AClark
ADay
AHamlin
AMarshall
ADavison
AHanson
ASanborn
AMiner
ABrule
ABuffalo
AHyde
AJerauld
ALyman
AAurora
AWalworth
AEdmunds
AFaulk
AMcPherson
APotter
ASully
ACampbell
ACorson
ASpink
ABrookings
AHarding
AKingsbury
AHutchinson
ALake
AUnion
APerkins
APennington
AMoody
AButte
AHand
AZiebach
AMinnehaha
AHaakon
ADewey
ABrown
ALawrence
ALincoln
AYankton
ACodington
ABeadle
AGregory
AHughes
ATripp
AStanley
AFall River
AMeade
ATurner
ABon Homme
ABennett
BMcCook
BCharles Mix
BCuster
BDouglas
BJones
BMellette
BOglala Lakota
BJackson
CClay
DTodd
Internet Providers in South Dakota
| Provider | ZIP Codes | Max Speed |
|---|---|---|
| T-Mobile | — | 25 Mbps |
| Lumen (CenturyLink) | — | 940 Mbps |
| Rise Broadband | 375 | 250 Mbps |
| Midcontinent Communications | 375 | 1,000 Mbps |
| Celerity Broadband LLC | 375 | 40 Mbps |
| Golden West Telecommunications | 375 | 100 Mbps |
| Venture Communications Cooperative, INC | 375 | 1,000 Mbps |
| Interstate Telecommunications Cooperative, INC. | 375 | 1,000 Mbps |
Cities in South Dakota
Neighboring States
Test Your Speed
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Frequently Asked Questions
What is the average internet speed in South Dakota?
South Dakota has an average maximum download speed of 897 Mbps across 375 ZIP codes. 100% of areas have fiber internet access, and the state averages 10 providers per ZIP code.
Which counties in South Dakota have the best internet?
The counties with the best broadband in South Dakota include Roberts (Grade A), Deuel (Grade A), Grant (Grade A). These areas have the fastest average speeds and most provider competition.
How does South Dakota compare to the national average?
The national average download speed is 876 Mbps, while South Dakota averages 897 Mbps — above the national average. Nationally, 96% of areas have fiber, compared to 100% in South Dakota.
Sources: FCC Broadband Data Collection