Carrierlytics County Coverage Guide

Cook County, IL Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Cook County, IL.

Using FCC mobile coverage data across cities and ZIP codes in Cook County, IL, Carrierlytics compares the top-performing networks and the cheapest plans that use them.

Cook County, IL

Cell phone coverage map for Cook County, IL

Zoom in for local detail. Tap or click a colored area to see coverage and signal details. On mobile, use two fingers to move the map.

Coverage Key
Less covered More covered
Darker areas mean the carrier covers more of that location.

Map data © OpenStreetMap contributors, © CARTO. Rendered with MapLibre. FCC BDC mobile coverage processed by Carrierlytics.

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Cell phone coverage rankings by network in Cook County, IL

#1

T-Mobile

Coverage Score 98.4
In Cook County, IL
Overall
99.9%
4G LTE
99.9% avg. -79 dBm 4G LTE signal where 4G LTE coverage exists: avg. -79 dBm
5G
99.2% avg. -77 dBm 5G signal where 5G coverage exists: avg. -77 dBm
Fast 5G
96.6% avg. -76 dBm Fast 5G signal where Fast 5G coverage exists: avg. -76 dBm
#2

Verizon

Coverage Score 94.7
In Cook County, IL
Overall
100.0%
4G LTE
100.0% avg. -79 dBm 4G LTE signal where 4G LTE coverage exists: avg. -79 dBm
5G
99.1% avg. -87 dBm 5G signal where 5G coverage exists: avg. -87 dBm
Fast 5G
92.0% avg. -86 dBm Fast 5G signal where Fast 5G coverage exists: avg. -86 dBm
#3

AT&T

Coverage Score 87.6
In Cook County, IL
Overall
99.9%
4G LTE
99.9% avg. -92 dBm 4G LTE signal where 4G LTE coverage exists: avg. -92 dBm
5G
99.2% avg. -97 dBm 5G signal where 5G coverage exists: avg. -97 dBm
Fast 5G
78.3% avg. -94 dBm Fast 5G signal where Fast 5G coverage exists: avg. -94 dBm
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Coverage by city in Cook County, IL

Cities and towns are shown for county-level comparison. Coverage percentages use land-area only coverage.

City Verizon AT&T T-Mobile
Alsip, IL 100.0% 100.0% 100.0% 98.8% 100.0% 100.0% 100.0% 85.1% 100.0% 100.0% 100.0% 100.0%
Arlington Heights, IL 100.0% 100.0% 100.0% 98.8% 100.0% 100.0% 100.0% 77.1% 100.0% 100.0% 92.0% 85.3%
Barrington, IL 100.0% 100.0% 100.0% 91.3% 100.0% 100.0% 100.0% 83.5% 100.0% 100.0% 100.0% 95.7%
Barrington Hills, IL 100.0% 100.0% 91.7% 56.9% 100.0% 100.0% 91.4% 60.8% 96.8% 96.8% 88.1% 56.5%
Bedford Park, IL 100.0% 100.0% 100.0% 99.3% 100.0% 100.0% 100.0% 86.1% 100.0% 100.0% 100.0% 99.3%
Bellwood, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 72.9% 100.0% 100.0% 100.0% 100.0%
Berkeley, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 71.4% 100.0% 100.0% 100.0% 100.0%
Berwyn, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 90.7% 100.0% 100.0% 100.0% 100.0%
Blue Island, IL 100.0% 100.0% 100.0% 98.9% 100.0% 100.0% 100.0% 75.8% 100.0% 100.0% 100.0% 100.0%
Bridgeview, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 90.8% 100.0% 100.0% 100.0% 100.0%
Broadview, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 79.5% 100.0% 100.0% 100.0% 100.0%
Brookfield, IL 100.0% 100.0% 100.0% 97.3% 100.0% 100.0% 100.0% 80.0% 100.0% 100.0% 100.0% 98.7%
Burbank, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 94.3% 100.0% 100.0% 100.0% 100.0%
Burnham, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 70.2% 100.0% 100.0% 100.0% 100.0%
Calumet City, IL 100.0% 100.0% 100.0% 94.9% 100.0% 100.0% 100.0% 80.6% 100.0% 100.0% 100.0% 100.0%
Calumet Park, IL 100.0% 100.0% 100.0% 85.7% 100.0% 100.0% 100.0% 82.1% 100.0% 100.0% 100.0% 100.0%
Chicago, IL 100.0% 100.0% 99.4% 95.0% 99.9% 99.9% 99.8% 82.2% 99.9% 99.9% 99.1% 99.0%
Chicago Heights, IL 100.0% 100.0% 100.0% 95.3% 100.0% 100.0% 99.6% 79.4% 100.0% 100.0% 100.0% 100.0%
Chicago Ridge, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 75.9% 100.0% 100.0% 100.0% 100.0%
Cicero, IL 100.0% 100.0% 100.0% 97.9% 100.0% 100.0% 100.0% 70.4% 100.0% 100.0% 100.0% 100.0%
Country Club Hills, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 72.6% 100.0% 100.0% 100.0% 100.0%
Countryside, IL 100.0% 100.0% 100.0% 95.7% 100.0% 100.0% 98.6% 75.7% 100.0% 100.0% 100.0% 100.0%
Crestwood, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 77.6% 100.0% 100.0% 100.0% 100.0%
Des Plaines, IL 100.0% 100.0% 99.4% 94.3% 100.0% 100.0% 100.0% 73.6% 100.0% 100.0% 100.0% 100.0%
Dixmoor, IL 100.0% 100.0% 100.0% 90.0% 100.0% 100.0% 100.0% 66.7% 100.0% 100.0% 100.0% 100.0%
Dolton, IL 100.0% 100.0% 99.1% 92.1% 100.0% 100.0% 100.0% 78.1% 100.0% 100.0% 100.0% 100.0%
East Hazel Crest, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 36.8% 100.0% 100.0% 100.0% 100.0%
Elk Grove Village, IL 100.0% 100.0% 100.0% 99.6% 100.0% 100.0% 100.0% 72.7% 100.0% 100.0% 100.0% 100.0%
Elmwood Park, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 82.6% 100.0% 100.0% 100.0% 100.0%
Evanston, IL 100.0% 100.0% 98.4% 89.8% 100.0% 100.0% 100.0% 82.3% 100.0% 100.0% 100.0% 96.8%
Evergreen Park, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 86.8% 100.0% 100.0% 100.0% 100.0%
Flossmoor, IL 100.0% 100.0% 100.0% 88.6% 100.0% 100.0% 100.0% 68.2% 100.0% 100.0% 100.0% 100.0%
Ford Heights, IL 100.0% 100.0% 79.2% 66.7% 100.0% 100.0% 100.0% 70.8% 100.0% 100.0% 100.0% 100.0%
Forest Park, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 76.7% 100.0% 100.0% 100.0% 100.0%
Forest View, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 72.4% 100.0% 100.0% 100.0% 100.0%
Franklin Park, IL 100.0% 100.0% 100.0% 99.1% 100.0% 100.0% 100.0% 82.3% 100.0% 100.0% 100.0% 100.0%
Glencoe, IL 100.0% 100.0% 100.0% 71.9% 100.0% 97.8% 100.0% 74.2% 100.0% 100.0% 100.0% 87.6%
Glenview, IL 100.0% 100.0% 99.1% 89.1% 100.0% 100.0% 100.0% 84.0% 100.0% 100.0% 100.0% 99.7%
Glenwood, IL 100.0% 100.0% 100.0% 89.9% 100.0% 100.0% 100.0% 79.7% 100.0% 100.0% 100.0% 100.0%
Golf, IL 100.0% 100.0% 100.0% 55.6% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Harvey, IL 100.0% 100.0% 100.0% 99.3% 100.0% 100.0% 100.0% 84.3% 100.0% 100.0% 100.0% 100.0%
Harwood Heights, IL 100.0% 100.0% 100.0% 95.7% 100.0% 100.0% 100.0% 95.7% 100.0% 100.0% 100.0% 100.0%
Hazel Crest, IL 100.0% 100.0% 100.0% 95.4% 100.0% 100.0% 100.0% 85.1% 100.0% 100.0% 100.0% 100.0%
Hickory Hills, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 91.2% 100.0% 100.0% 100.0% 100.0%
Hillside, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 73.8% 100.0% 100.0% 100.0% 100.0%
Hines, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 81.8% 100.0% 100.0% 100.0% 100.0%
Hodgkins, IL 100.0% 100.0% 100.0% 96.9% 100.0% 100.0% 100.0% 86.2% 100.0% 100.0% 100.0% 100.0%
Hoffman Estates, IL 100.0% 100.0% 97.8% 86.0% 99.8% 99.8% 98.6% 66.2% 100.0% 100.0% 98.2% 90.4%
Hometown, IL 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 54.5% 100.0% 100.0% 100.0% 100.0%
Homewood, IL 100.0% 100.0% 100.0% 95.9% 100.0% 100.0% 100.0% 74.6% 100.0% 100.0% 100.0% 100.0%

About The Coverage Data

Coverage and signal estimates are derived by Carrierlytics from carrier-reported data in the FCC’s National Broadband Coverage Map, last updated in June 2025. “Percent covered” shows how much of the city or ZIP code area has a carrier signal, whether weak or strong. Signal bars show the estimated average signal strength in areas of Cook County, IL where that carrier has coverage.

If a carrier says you should have service but you do not, run a challenge test with the FCC Mobile Speed Test App. The FCC uses those results to check carrier-submitted coverage data and requires a carrier response when enough tests show a pattern of inaccurate coverage reporting.