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DSDownloadSpeed
FCC Data · Updated April 2026
A

Boulder County Internet

Boulder County, Colorado has a Broadband Grade of A with an average download speed of 1000 Mbps across 18 ZIP codes. 100% of the county has fiber internet access, and the area averages 10 providers per ZIP code. Internet access is above average for the U.S.

93
Score
1000 Mbps
Avg Download
100%
Fiber Access
10
Avg Providers
Grade Distribution

ZIP Code Grades in Boulder County

A
18
B
0
C
0
D
0
F
0
Best

Fastest ZIP Codes in Boulder County

ZIPGradeDownloadProvidersFiber
80025A1000 Mbps10Yes
80026A1000 Mbps10Yes
80027A1000 Mbps10Yes
80301A1000 Mbps10Yes
80302A1000 Mbps10Yes
80303A1000 Mbps10Yes
80304A1000 Mbps10Yes
80305A1000 Mbps10Yes
80310A1000 Mbps10Yes
80455A1000 Mbps10Yes
Needs Improvement

Slowest ZIP Codes in Boulder County

ZIPGradeDownloadProvidersFiber
80025A1000 Mbps10Yes
80026A1000 Mbps10Yes
80027A1000 Mbps10Yes
80301A1000 Mbps10Yes
80302A1000 Mbps10Yes
80303A1000 Mbps10Yes
80304A1000 Mbps10Yes
80305A1000 Mbps10Yes
80310A1000 Mbps10Yes
80455A1000 Mbps10Yes
FAQ

Frequently Asked Questions

What is the average internet speed in Boulder County, Colorado?

Boulder County, Colorado has an average maximum download speed of 1000 Mbps across 18 ZIP codes. The county received a Broadband Grade of A (93/100), which factors in download speed, provider competition, fiber availability, and upload speed. This meets the FCC broadband standard of 100 Mbps download.

How many internet providers are in Boulder County?

Boulder County has an average of 10 internet providers per ZIP code. 100% of ZIP codes in the county have fiber internet access. Having 3 or more providers typically leads to better prices and service quality through competition.

Is there fiber internet in Boulder County?

100% of ZIP codes in Boulder County, Colorado have fiber internet available. Fiber provides the fastest and most reliable connections, typically 500 Mbps to 5 Gbps with symmetrical upload speeds. Fiber coverage in this county is above the national average.

What is the best ZIP code for internet in Boulder County?

The best-connected ZIP code in Boulder County is 80025 with a Broadband Grade of A, 1000 Mbps maximum download, and 10 providers. Fiber internet is available in this ZIP code.

Test Your Speed

See how your connection compares to Boulder County's 1000 Mbps average.