In Castle Rock there is 1 residential Fiber provider covering 12.01% of the city. The average home can get speeds up to 1,927 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 Castle Rock, WA.
To see availability maps for all providers including fiber, cable, DSL, and more in Castle Rock, WA please click below.
Castle Rock, WA Availability Maps
Fiber Internet Service Provider in Castle Rock
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 Castle Rock are not shown.
Castle Rock 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 Castle Rock is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 12.01% of Castle Rock. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is Astound Broadband. Call one of the companies with service in Castle Rock above to see who has service at your home.
How fast is fiber internet in Castle Rock?
The map below shows maximum fiber internet speeds by area in Castle Rock.
Fiber Internet Speed Key
The average Castle Rock home can get up to 1,927 Mbps on their fiber internet plan. The fastest fiber download speed in the city is 2,000 Mbps, which 11.14% 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 1,000 Mbps. See the internet provider details below for info about their speed and coverage in Castle Rock.
Fiber internet speeds tend to be faster in the central parts of Castle Rock, and slower in the northwest areas of the city.
Is fiber the fastest internet I can get in Castle Rock?
The fastest internet for you may vary based on where in Castle Rock you live. In general, cable competes most often with fiber in the city.
- Fiber is the fastest internet type for 12.01% of Castle Rock homes.
- Cable is fastest for 79.50% of the city.
- DSL is fastest for 3.02%.
- Fixed wireless is fastest for 5.16%.
- Satellite internet may be the only option for less than 1% of Castle Rock homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in Castle Rock, along with details on where in Castle Rock and at what speeds.
Astound Broadband Fiber in Castle Rock, WA
Astound Broadband fiber coverage
About 11.14%, or 943 people, have Astound Broadband fiber internet available to them in the city. The company covers the central, south, and east Castle Rock 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 Castle Rock.
Astound Broadband fiber download speeds
Astound Broadband is the fastest when comparing download speeds to all other internet providers in Castle Rock. Versus other fiber providers in the area, Astound Broadband fiber is the fastest. There are no different maximum speeds throughout Castle Rock. The fastest plan anyone in Castle Rock can order from Astound Broadband goes up to 2,000 Mbps, and all Castle Rock customers can get this speed.
Show all download speeds
- 100.0% up to 2,000.0 Mbps
Astound Broadband fiber upload speeds
In Castle Rock download speeds tend to be equal to than upload speeds for Astound Broadband fiber. Compared to other ISPs, Astound Broadband is the fastest where upload speeds are concerned, and the fastest compared to other Castle Rock fiber providers. Astound Broadband offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Castle Rock is up to 2,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 2,000.0 Mbps
Castle Rock Fiber by Area
This information is most helpful to those looking for homes or considering moving to Castle Rock or any of the areas nearby.
How does fiber internet in Castle Rock compare to the rest of Washington?
Fiber internet speeds in Castle Rock are much faster versus the average speeds in Washington: 0.00 Mbps in Washington versus 1,927 Mbps in the city. The state has similar fiber availability compared to the city. Average fiber coverage in Washington is 0.00% versus 12.01% in Castle Rock.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around Castle Rock 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 cities?
Below are cities nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Cities
- Vader, WA: more fiber coverage, slower speeds
- Ryderwood, WA: less fiber coverage, slower speeds
- Kelso, WA: more fiber coverage, faster speeds
- Longview, WA: more fiber coverage, faster speeds
- Sightly, WA: more fiber coverage, slower speeds
- Toutle, WA: less fiber coverage, slower speeds
- Toledo, WA: more fiber coverage, slower speeds
- Mayger, OR: more fiber coverage, slower speeds
- Wildwood, WA: more fiber coverage, slower speeds
- Locoda, OR: more fiber coverage, slower speeds
Cities with Similar Populations
- Terryville, CT: more fiber coverage, faster speeds
- Atlantic Highlands, NJ: more fiber coverage, slower speeds
- August, CA: more fiber coverage, faster speeds
- Aurora, IN: more fiber coverage, slower speeds
- Ayden, NC: more fiber coverage, faster speeds
- Williamsburg, OH: more fiber coverage, slower speeds
- Barnwell, SC: more fiber coverage, slower speeds
- Basehor, KS: more fiber coverage, faster speeds
- Wiggins, MS: more fiber coverage, faster speeds
- Whitney, TX: more fiber coverage, slower speeds