Sierra County is mixed. No single technology dominates, so what you can get depends heavily on which side of the county you are on. The numbers below show what exists; your address decides which of it reaches you.
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 Sierra County sits in New Mexico
Share of addresses with no fixed broadband at 25/3 Mbps
0.0% to 1.4%
1.4% to 4.6%
4.6% to 6.6%
6.6% to 8.0%
8.0% to 12%
12% to 22%
22% 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 Sierra County
Locations covered by each technology, out of 8,000 broadband serviceable locations. An address can be reached by more than one technology, so these add up to more than 100%.
Fiber2,543 · 32%
Cable5,252 · 66%
Licensed fixed wireless3,886 · 49%
Unlicensed fixed wireless0 · 0.0%
DSL over copper603 · 7.5%
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
7,221
90.3%
Underserved
181
2.3%
Unserved
598
7.5%
What that means if you live here
The USDA classes Sierra County as a nonmetro county with an urban population of 5,000 to 20,000, adjacent to a metro area (continuum code 6).
About 11,502 people live across those locations, roughly 1.4 people per serviceable address.
7.5% of addresses here, 598 of them, fall below 25/3 Mbps or have no fixed option at all.
Another 181 can get something, but not the 100/20 Mbps the FCC now treats as the benchmark.
The most widely available technology here is cable, reaching 5,252 locations (65.6%); next is licensed fixed wireless at 48.6%.
Fiber reaches 2,543 locations, 31.8% of the county.
Licensed fixed wireless covers 48.6% of the county. It does not reach as far as cable does here, but it reaches places cable does not.
Cable reaches 65.6% of locations, more than fiber does, and it will be concentrated in the built-up parts of the county.
Filings come from 12 providers, of which 3 offer fiber and 3 licensed fixed wireless.
Fiber reached 32 more locations in Sierra County over the last twelve months, a 0.4% swing in the county's total.
Served locations rose 3.16% year on year.
Fiber lags the rest of New Mexico, where the median county is at 45.1%.
What people actually measure in New Mexico
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
133 Mbps
46.4 Mbps to 322 Mbps
11.8 Mbps
15 ms
64,031
CenturyLink Communications
23.3 Mbps
8.9 Mbps to 50.9 Mbps
3.8 Mbps
32 ms
19,930
TDS TELECOM
105 Mbps
43.4 Mbps to 213 Mbps
12.2 Mbps
52 ms
6,698
AT&T Enterprises
36.7 Mbps
16.3 Mbps to 77.8 Mbps
3.7 Mbps
48 ms
5,342
CABLE ONE
121 Mbps
57.3 Mbps to 229 Mbps
18.2 Mbps
55 ms
4,791
Windstream Communications
32.4 Mbps
10.7 Mbps to 111 Mbps
10.2 Mbps
28 ms
4,455
Plateau Telecommunications
93.2 Mbps
32.1 Mbps to 221 Mbps
72.3 Mbps
32 ms
4,032
Kit Carson Electric Cooperative
50.5 Mbps
19.5 Mbps to 86.2 Mbps
32.7 Mbps
43 ms
1,924
NMSURF
44.5 Mbps
16.7 Mbps to 78.0 Mbps
9.6 Mbps
52 ms
1,427
Sharktech
46.9 Mbps
23.5 Mbps to 101 Mbps
5.5 Mbps
1 ms
1,160
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
25.0 Mbps
4.8 Mbps to 73.5 Mbps
7.9 Mbps
34 ms
21,682
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 Sierra 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.