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DSDownloadSpeed
FCC Data · Updated April 2026
B

Mercer County Internet

Mercer County, Illinois has a Broadband Grade of B with an average download speed of 100 Mbps across 13 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.

65
Score
100 Mbps
Avg Download
100%
Fiber Access
10
Avg Providers
Grade Distribution

ZIP Code Grades in Mercer County

A
0
B
13
C
0
D
0
F
0
Best

Fastest ZIP Codes in Mercer County

ZIPGradeDownloadProvidersFiber
61231B100 Mbps10Yes
61260B100 Mbps10Yes
61263B100 Mbps10Yes
61272B100 Mbps10Yes
61276B100 Mbps10Yes
61279B100 Mbps10Yes
61281B100 Mbps10Yes
61412B100 Mbps10Yes
61442B100 Mbps10Yes
61465B100 Mbps10Yes
Needs Improvement

Slowest ZIP Codes in Mercer County

ZIPGradeDownloadProvidersFiber
61231B100 Mbps10Yes
61260B100 Mbps10Yes
61263B100 Mbps10Yes
61272B100 Mbps10Yes
61276B100 Mbps10Yes
61279B100 Mbps10Yes
61281B100 Mbps10Yes
61412B100 Mbps10Yes
61442B100 Mbps10Yes
61465B100 Mbps10Yes
FAQ

Frequently Asked Questions

What is the average internet speed in Mercer County, Illinois?

Mercer County, Illinois has an average maximum download speed of 100 Mbps across 13 ZIP codes. The county received a Broadband Grade of B (65/100), 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 Mercer County?

Mercer 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 Mercer County?

100% of ZIP codes in Mercer County, Illinois 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 Mercer County?

The best-connected ZIP code in Mercer County is 61231 with a Broadband Grade of B, 100 Mbps maximum download, and 10 providers. Fiber internet is available in this ZIP code.

Test Your Speed

See how your connection compares to Mercer County's 100 Mbps average.