How Connecticut compares
Desktop vs mobile
By operating system
📡 Most-used test servers
Internet providers measured in Connecticut, ranked by speed
Median real-world speeds for the 4 fixed home internet providers with at least 100 distinct connections in Connecticut, fastest first. These are the speeds their customers measured, not advertised plan speeds, and not a statement of who can be bought at a given address.
| # | Provider | Download | Upload | Latency | Connections |
|---|---|---|---|---|---|
| 1 | Frontier | 295.1 | 147.6 | 16 ms | 500+ |
| 2 | Optimum | 274.2 | 39.6 | 17 ms | 250+ |
| 3 | Comcast | 189.1 | 44.7 | 25 ms | 500+ |
| 4 | Spectrum | 187.6 | 22.9 | 35 ms | 100+ |
Measured in Connecticut and named rather than ranked: AT&T, T-Mobile US, Verizon. In Connecticut each of these is the operator's mobile network rather than a wired home line, and a browser test cannot tell a phone from a 5G home gateway on the same network. Ranking them beside fibre and cable would compare two different products.
Internet in Connecticut: what the data shows
In Connecticut, the median real-world download speed is 189.1 Mbps, 30% above the median published state of 145.6 Mbps, ranking #2 of the 39 states and districts with enough data to publish. That is among the fastest we publish.
Connecticut ranks second on one of the smallest fields in the table, and it splits in two: the top pair are roughly 85 Mbps clear of the pair below them.
Uploads median 45.0 Mbps and latency 24 ms. That is among the lowest latency we publish, so live video and gaming should feel responsive on a typical connection.
Desktop tests run about 1.1× faster than mobile, and mobile is 34% of tests.
Across the 4 fixed providers with enough connections to rank here, medians run from 295.1 Mbps (Frontier) down to 187.6 Mbps (Spectrum), a 1.6× spread inside one state. Which network reaches an address matters more here than which state the address is in.
The Connecticut sample carries enough tests to name 7 providers, 8 planning regions and 14 cities and localities.
Figures are medians of 2k+ browser-based tests from 2k+ distinct connections, first half of 2026. Each connection counts at most three times, third-party sources are capped, and datacenter networks are excluded, so one busy line cannot move a state. That makes these numbers a different series from the national figure on the United States page, and they are not directly comparable to it.
Where the Connecticut data comes from
8 planning regions with enough tests to name:
14 cities and localities with enough tests to name:
Show all 14 cities and localitiesShow fewer
Planning regions, cities and localities are named, never numbered, and listed alphabetically. Speeds below state level are part of the licensed dataset.
Where Connecticut ranks
Test your own speed in Connecticut
Free, no app, real-time graph. See how your connection compares.
Frequently asked questions
What is the average internet speed in Connecticut?
The median real-world download speed in Connecticut is 189.1 Mbps, with 45.0 Mbps upload and 24 ms latency, measured from 2k+ browser-based speed tests on SpeedOf.Me.
Where does Connecticut rank among US states?
Connecticut ranks #2 of the 39 states and districts we publish, 30% above the median published state. We publish a state only where at least 2,000 distinct connections back the number, so 12 of the 51 are not listed at all.
Why is this lower than the speed my provider advertises?
An advertised speed is the maximum the line can carry. This is a real-world measurement through a browser to neutral servers on the open internet, which is what a video call, a download or a game actually gets. Wi-Fi, the device and time of day all sit between the two.
Which internet provider is fastest in Connecticut?
Of the fixed home internet providers with at least 100 distinct connections in Connecticut, Frontier has the highest median real-world download speed at 295.1 Mbps, ahead of Optimum at 274.2 Mbps. That is the median its customers measured here, not an advertised plan speed, and a provider is only as fast as the line that reaches your address.
Which internet providers were measured in Connecticut?
7 providers had enough tests in Connecticut to name: AT&T, Comcast, Frontier, Optimum, Spectrum, T-Mobile US, Verizon. 4 of them carry a ranked median speed on this page: the rest are either a carrier's mobile network in Connecticut rather than a wired home line, or below the 100 distinct connections we require before publishing a median. That list is not a market-share estimate or a statement of who can be bought at a given address.
Are speeds on phones lower than on computers in Connecticut?
Tests run on phones and tablets, over home Wi-Fi or a cellular connection, are 34% of the Connecticut sample and median 178.3 Mbps. Tests run on desktops and laptops, which are almost always on a fixed line's Wi-Fi, median 194.2 Mbps. This is a device comparison, not a comparison of providers.
How current is this data?
It covers first half of 2026 and was last updated on 2026-09-05. The dataset is free to reuse with attribution under CC BY 4.0.
Explore more
Understand your speed
Need US data below state level?
County, city and postal-code detail, ISP and network breakdowns, raw test-level records and custom date ranges.