Clark County is genuinely hard to serve. 18.1% of locations here have no fixed broadband at all, so for a lot of addresses the real choice is satellite or a cellular home-internet gateway, not a wired provider.
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 Clark County sits in Illinois
Share of addresses with no fixed broadband at 25/3 Mbps
0.0% to 2.7%
2.7% to 4.2%
4.2% to 5.0%
5.0% to 7.0%
7.0% to 9.7%
9.7% to 13%
13% 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 Clark County
Locations covered by each technology, out of 8,509 broadband serviceable locations. An address can be reached by more than one technology, so these add up to more than 100%.
Fiber4,976 · 58%
Cable4,445 · 52%
Licensed fixed wireless4,595 · 54%
Unlicensed fixed wireless4,406 · 52%
DSL over copper27 · 0.3%
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
6,350
74.6%
Underserved
615
7.2%
Unserved
1,544
18.1%
What that means if you live here
The USDA classes Clark County as a completely rural county, or one with an urban population under 5,000, adjacent to a metro area (continuum code 8).
Population is around 15,300, which works out to about 1.8 people for every address on the list.
1,544 locations, 18.1% of the county, have nothing that reaches 25/3 Mbps.
A further 7.2% of the county sits in the middle: served, but below the 100/20 Mbps mark.
The most widely available technology here is fiber, reaching 4,976 locations (58.5%); next is licensed fixed wireless at 54.0%.
Fiber reaches 4,976 locations, 58.5% of the county.
Licensed fixed wireless covers 54.0% of the county. It does not reach as far as fiber does here, but it reaches places fiber does not.
16 providers file coverage in Clark County: 5 with fiber, 1 with cable, 5 with licensed fixed wireless.
Served locations rose 4.98% year on year.
Clark County is harder-served than the typical Illinois county, where the median unserved share is 4.6%.
What people actually measure in Illinois
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
Comcast Cable Communications
152 Mbps
56.6 Mbps to 321 Mbps
21.3 Mbps
8 ms
531,546
AT&T Enterprises
80.0 Mbps
27.8 Mbps to 262 Mbps
19.2 Mbps
6 ms
143,769
Verizon Business
36.9 Mbps
10.3 Mbps to 101 Mbps
6.3 Mbps
27 ms
102,625
ZSCALER
70.8 Mbps
22.7 Mbps to 148 Mbps
20.2 Mbps
1 ms
79,047
RCN
146 Mbps
37.6 Mbps to 337 Mbps
23.3 Mbps
7 ms
50,139
Charter Communications
152 Mbps
69.3 Mbps to 315 Mbps
11.0 Mbps
14 ms
29,193
Mediacom Communications
117 Mbps
50.9 Mbps to 308 Mbps
26.0 Mbps
12 ms
24,579
Metronet
137 Mbps
67.1 Mbps to 307 Mbps
101 Mbps
22 ms
15,878
ITV-3
196 Mbps
72.2 Mbps to 373 Mbps
136 Mbps
8 ms
9,002
CABLE ONE
125 Mbps
57.1 Mbps to 279 Mbps
29.0 Mbps
17 ms
7,199
Cellular networks, measured
The same measurement for the mobile networks behind 5G home internet. These tests come from phones as well as home gateways, so treat them as an indication of network health in the state rather than a home-internet plan speed.
Network
Median download
Middle half of tests
Median upload
Latency
Tests
T-Mobile USA
51.9 Mbps
12.8 Mbps to 142 Mbps
8.5 Mbps
23 ms
115,353
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 Clark County
Satellite
Starlink
Low-earth-orbit satellite. Latency is low enough for video calls and most gaming, unlike older satellite services.
Best for
Anywhere with a clear view of the sky and no wired option
Watch out
Hardware costs money up front, and heavy tree cover or a north-facing obstruction will cost you throughput