Day County is better served than most rural counties. Fiber already reaches 98.1% of locations, so the first question is not what to buy but whether fiber has reached your road.
Everything below comes from the FCC's Broadband Data Collection, the filings providers are legally required to make about where they offer service. It describes the county; your own address can differ, and that is exactly why the technology mix matters.
Where Day County sits in South Dakota
Share of addresses with no fixed broadband at 25/3 Mbps
0.0% to 0.0%
0.0% to 0.2%
0.2% to 0.8%
0.8% to 1.2%
1.2% to 2.3%
2.3% to 9.9%
9.9% and above
not published
This county is outlined. Darker means a larger share of addresses with no fixed broadband. Select any county to open it.
What reaches homes in Day County
Locations covered by each technology, out of 4,009 broadband serviceable locations. An address can be reached by more than one technology, so these add up to more than 100%.
Fiber3,931 · 98%
Cable1,684 · 42%
Licensed fixed wireless365 · 9.1%
Unlicensed fixed wireless0 · 0.0%
DSL over copper0 · 0.0%
Served, underserved, unserved
The FCC's three categories. "Served" means at least 100/20 Mbps is available; "underserved" means at least 25/3 but below 100/20; "unserved" means below 25/3 or nothing at all.
Category
Locations
Share of county
Served
3,931
98.1%
Underserved
2
0.0%
Unserved
76
1.9%
What that means if you live here
The USDA classes Day County as a completely rural county, or one with an urban population under 5,000, not adjacent to any metro area (continuum code 9).
About 5,414 people live across those locations, roughly 1.4 people per serviceable address.
Only 76 locations, 1.9%, are recorded with nothing at 25/3 Mbps or better.
The most widely available technology here is fiber, reaching 3,931 locations (98.1%); next is cable at 42.0%.
Fiber already reaches 98.1% of the county (3,931 locations), which puts Day County well ahead of most rural America.
Filings come from 11 providers, of which 3 offer fiber and 5 licensed fixed wireless.
Fiber reached 35 more locations in Day County over the last twelve months, a 0.9% swing in the county's total.
Served locations rose 0.87% year on year.
What people actually measure in South Dakota
Median of real speed tests run on each network during 2024, from M-Lab. This is measured performance, not an advertised plan speed, and not a customer review. The middle-half column shows how consistent a network is: a wide spread means your experience depends heavily on where and when.
Network
Median download
Middle half of tests
Median upload
Latency
Tests
Midcontinent Communications
116 Mbps
60.1 Mbps to 244 Mbps
30.1 Mbps
32 ms
15,783
Clarity Telecom
125 Mbps
66.4 Mbps to 206 Mbps
19.0 Mbps
27 ms
6,284
SDN Communications
87.3 Mbps
36.4 Mbps to 168 Mbps
39.0 Mbps
33 ms
4,771
Golden West Telecommunications Coop
99.5 Mbps
26.6 Mbps to 197 Mbps
81.2 Mbps
31 ms
2,408
CenturyLink Communications
27.7 Mbps
8.2 Mbps to 61.9 Mbps
3.7 Mbps
49 ms
1,025
Northern Valley Communications
51.6 Mbps
29.5 Mbps to 92.4 Mbps
16.4 Mbps
34 ms
948
SWIFTEL COMMUNICATIONS
64.6 Mbps
37.8 Mbps to 102 Mbps
9.8 Mbps
31 ms
880
Mediacom Communications
124 Mbps
42.2 Mbps to 184 Mbps
21.4 Mbps
39 ms
875
Long Lines Internet
87.8 Mbps
71.7 Mbps to 138 Mbps
14.3 Mbps
29 ms
526
South Dakota State Government
87.9 Mbps
52.1 Mbps to 149 Mbps
62.3 Mbps
34 ms
411
Latency is the number that decides whether video calls and gaming feel right, and it is where satellite differs most from everything else. Measured data is statewide: below county level there are usually too few tests to report an honest number.
Disclosure: some links on this page are affiliate links. If you sign up for a service or buy equipment through one, we may earn a commission at no extra cost to you. It never changes which options we list or the order we rank them in, and we do not accept payment for a better placement.
Your realistic options in Day County
Fiber
Fiber, if it has reached you
The best outcome by a distance: symmetric speed, low latency, no weather sensitivity, no data ceiling in practice.
Best for
Anyone whose address is inside a fiber build. Always check this first.
Watch out
Coverage stops abruptly at the edge of a build. Being a mile from fiber is the same as being fifty.
Fixed wireless
A local fixed-wireless provider
A regional operator beaming service from a tower or ridge to an antenna on your roof. In much of rural America this is the fastest thing available.
Best for
Counties where the FCC data shows large licensed fixed-wireless coverage, which this page tells you
Watch out
Needs line of sight. Quality varies enormously between operators; ask neighbours, not the sales page.
5G home internet
T-Mobile Home Internet
Home internet over T-Mobile’s cellular network. A gateway box you plug in yourself; no truck roll, no dish.
Best for
Rural addresses that still get a usable T-Mobile signal, often near a highway or a town
Watch out
Availability is decided address by address, not by town. Speed varies with how busy the local tower is.