In King County there are 5 residential Fiber providers covering 60.06% of the county. The average home can get speeds up to 3,135 Mbps. Note that we may have a financial relationship with some of the providers below. This does not influence rankings, and helps us provide high-quality detailed information for free.
This page contains all Fiber internet providers in King County, WA.
To see availability maps for all providers including fiber, cable, DSL, and more in King County, WA please click below.
King County, WA Availability Maps
Fiber Internet Service Providers in King County
Data updated 11/14/2025, based on FCC data from 12/31/2024. This is the most current data available as of .
To avoid wasting your time, providers with less than 1% coverage in King County are not shown.
King County Satellite TV & Internet Providers
DISH Satellite TV
DIRECTV Satellite TV
Not sure whether to choose Dish or DIRECTV? For most people most of the time we recommend DISH. But click here to learn more.
Viasat Satellite Internet
Where in King County is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 60.06% of King County. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is Quantum Fiber. Call one of the companies with service in King County above to see who has service at your home.
How fast is fiber internet in King County?
The map below shows maximum fiber internet speeds by area in King County.
Fiber Internet Speed Key
The average King County home can get up to 3,135 Mbps on their fiber internet plan. The fastest fiber download speed in the county is 8,000 Mbps, which 3.38% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, less than 1% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in King County.
Fiber internet speeds tend to be faster in the northeast parts of King County, and slower in the southwest areas of the county.
Is fiber the fastest internet I can get in King County?
The fastest internet for you may vary based on where in King County you live. In general, cable competes most often with fiber in the county.
- Fiber is the fastest internet type for 40.52% of King County homes.
- Cable is fastest for 58.35% of the county.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for less than 1%.
- Satellite internet may be the only option for less than 1% of King County homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in King County, along with details on where in King County and at what speeds.
Quantum Fiber Fiber in King County, WA
Quantum Fiber fiber coverage
About 42.62%, or 967,274 people, have Quantum Fiber fiber internet available to them in the county. The company covers the entire King County area. Quantum Fiber is one of the largest internet service providers internet service providers in the US, with internet service available in some of King County.
Quantum Fiber fiber download speeds
Quantum Fiber is above average when comparing download speeds to all other internet providers in King County. Versus other fiber providers in the area, Quantum Fiber fiber is above average. There are 5 different maximum speeds throughout King County. The fastest plan anyone in King County can order from Quantum Fiber goes up to 8,000 Mbps, the slowest package only goes up to 940 Mbps, and the county-wide average maximum speed for King County customers is up to 2,303 Mbps.
Show all download speeds
- 7.9% up to 8,000.0 Mbps
- 0.4% up to 3,000.0 Mbps
- 74.8% up to 2,000.0 Mbps
- 3.4% up to 1,000.0 Mbps
- 13.5% up to 940.0 Mbps
Quantum Fiber fiber upload speeds
In King County download speeds tend to be faster than than upload speeds for Quantum Fiber fiber. Compared to other ISPs, Quantum Fiber is above average where upload speeds are concerned, and below average compared to other King County fiber providers. Quantum Fiber offers 4 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in King County is up to 8,000 Mbps. Some customers have slower plan choices, which only go up to 940 Mbps. On average, Quantum Fiber customers can get speeds up to 1,555 Mbps.
Show all upload speeds
- 7.9% up to 8,000.0 Mbps
- 0.4% up to 3,000.0 Mbps
- 78.2% up to 1,000.0 Mbps
- 13.5% up to 940.0 Mbps
Centurylink Fiber in King County, WA
Centurylink fiber coverage
About 36.03%, or 817,651 people, have Centurylink fiber internet available to them in the county. The company covers the entire King County area. Centurylink is one of the largest internet service providers internet service providers in the US, with internet service available in some of King County.
Centurylink fiber download speeds
Centurylink is below average when comparing download speeds to all other internet providers in King County. Versus other fiber providers in the area, Centurylink fiber is below average. There are 9 different maximum speeds throughout King County. The fastest plan anyone in King County can order from Centurylink goes up to 2,000 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for King County customers is up to 955 Mbps.
Show all download speeds
- 0.1% up to 2,000.0 Mbps
- 62.6% up to 1,000.0 Mbps
- 34.7% up to 940.0 Mbps
- 0.0% up to 500.0 Mbps
- 0.2% up to 200.0 Mbps
- 1.7% up to 100.0 Mbps
- 0.2% up to 80.0 Mbps
- 0.5% up to 40.0 Mbps
- 0.0% up to 10.0 Mbps
Centurylink fiber upload speeds
In King County download speeds tend to be faster than than upload speeds for Centurylink fiber. Compared to other ISPs, Centurylink is average where upload speeds are concerned, and below average compared to other King County fiber providers. Centurylink offers 13 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in King County is up to 1,000 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Centurylink customers can get speeds up to 889 Mbps.
Show all upload speeds
- 62.6% up to 1,000.0 Mbps
- 25.8% up to 940.0 Mbps
- 0.0% up to 750.0 Mbps
- 0.0% up to 500.0 Mbps
- 9.0% up to 200.0 Mbps
- 1.5% up to 100.0 Mbps
- 0.2% up to 50.0 Mbps
- 0.1% up to 40.0 Mbps
- 0.2% up to 20.0 Mbps
- 0.3% up to 10.0 Mbps
- 0.2% up to 5.0 Mbps
- 0.0% up to 3.0 Mbps
- 0.0% up to 1.0 Mbps
Ziply Fiber in King County, WA
Ziply fiber coverage
About 13.77%, or 312,537 people, have Ziply fiber internet available to them in the county. The company covers the northeast, north, northwest, east, central, southeast, west, and south King County area. Ziply is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of King County.
Ziply fiber download speeds
Ziply is the fastest when comparing download speeds to all other internet providers in King County. Versus other fiber providers in the area, Ziply fiber is the fastest. There are 2 different maximum speeds throughout King County. The fastest plan anyone in King County can order from Ziply goes up to 6,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the county-wide average maximum speed for King County customers is up to 5,882 Mbps.
Show all download speeds
- 97.6% up to 6,000.0 Mbps
- 2.4% up to 1,000.0 Mbps
Ziply fiber upload speeds
In King County download speeds tend to be equal to than upload speeds for Ziply fiber. Compared to other ISPs, Ziply is the fastest where upload speeds are concerned, and the fastest compared to other King County fiber providers. Ziply offers 2 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in King County is up to 6,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, Ziply customers can get speeds up to 5,882 Mbps.
Show all upload speeds
- 97.6% up to 6,000.0 Mbps
- 2.4% up to 1,000.0 Mbps
Astound Broadband Fiber in King County, WA
Astound Broadband fiber coverage
About 10.24%, or 232,527 people, have Astound Broadband fiber internet available to them in the county. The company covers the west, northwest, central, north, northeast, east, south, and southeast King County area. Astound Broadband is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of King County.
Astound Broadband fiber download speeds
Astound Broadband is above average when comparing download speeds to all other internet providers in King County. Versus other fiber providers in the area, Astound Broadband fiber is below average. There are no different maximum speeds throughout King County. The fastest plan anyone in King County can order from Astound Broadband goes up to 2,000 Mbps, and all King County customers can get this speed.
Show all download speeds
- 100.0% up to 2,000.0 Mbps
Astound Broadband fiber upload speeds
In King County download speeds tend to be equal to than upload speeds for Astound Broadband fiber. Compared to other ISPs, Astound Broadband is above average where upload speeds are concerned, and above average compared to other King County fiber providers. Astound Broadband offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in King County is up to 2,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 2,000.0 Mbps
XFINITY from Comcast Fiber in King County, WA
XFINITY fiber coverage
About 2.99%, or 67,777 people, have XFINITY fiber internet available to them in the county. The company covers the entire King County area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of King County.
XFINITY from Comcast fiber download speeds
XFINITY is above average when comparing download speeds to all other internet providers in King County. Versus other fiber providers in the area, XFINITY fiber is below average. There are 3 different maximum speeds throughout King County. The fastest plan anyone in King County can order from XFINITY goes up to 2,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the county-wide average maximum speed for King County customers is up to 1,531 Mbps.
Show all download speeds
- 44.0% up to 2,000.0 Mbps
- 45.5% up to 1,200.0 Mbps
- 10.5% up to 1,000.0 Mbps
XFINITY from Comcast fiber upload speeds
In King County download speeds tend to be faster than than upload speeds for XFINITY fiber. Compared to other ISPs, XFINITY is below average where upload speeds are concerned, and below average compared to other King County fiber providers. XFINITY offers 4 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in King County is up to 2,000 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, XFINITY customers can get speeds up to 507 Mbps.
Show all upload speeds
- 10.9% up to 2,000.0 Mbps
- 20.2% up to 1,000.0 Mbps
- 29.7% up to 250.0 Mbps
- 39.3% up to 35.0 Mbps
King County Fiber by Area
This information is most helpful to those looking for homes or considering moving to King County or any of the areas nearby.
How does fiber internet in King County compare to the rest of Washington?
Fiber internet speeds in King County are much faster versus the average speeds in Washington: 0.00 Mbps in Washington versus 3,135 Mbps in the county. The state has similar fiber availability compared to the county. Average fiber coverage in Washington is 0.00% versus 60.06% in King County.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around King County are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does fiber internet look like in other counties?
Below are counties nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Counties
- Kitsap County, WA: less fiber coverage, faster speeds
- Snohomish County, WA: more fiber coverage, faster speeds
- Pierce County, WA: less fiber coverage, slower speeds
- Mason County, WA: more fiber coverage, slower speeds
- Jefferson County, WA: less fiber coverage, slower speeds
- Thurston County, WA: less fiber coverage, faster speeds
- Clallam County, WA: less fiber coverage, slower speeds
- Kittitas County, WA: less fiber coverage, slower speeds
- Chelan County, WA: more fiber coverage, slower speeds
- Douglas County, WA: less fiber coverage, slower speeds
Counties with Similar Populations
- Orange County, CA: less fiber coverage, faster speeds
- Maricopa County, AZ: less fiber coverage, faster speeds
- Los Angeles County, CA: more fiber coverage, faster speeds
- San Diego County, CA: less fiber coverage, faster speeds
- Harris County, TX: more fiber coverage, faster speeds
- Miami-Dade County, FL: more fiber coverage, faster speeds
- Cook County, IL: less fiber coverage, faster speeds
- Burlington County, NJ: less fiber coverage, slower speeds
- Jefferson County, KY: more fiber coverage, faster speeds
- Macomb County, MI: less fiber coverage, faster speeds