Cell phone coverage map for Monroe County, FL
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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 Monroe County, FL
T-Mobile
- Overall
- 28.7%
- 4G LTE
- 28.7% avg. -95 dBm 4G LTE signal where 4G LTE coverage exists: avg. -95 dBm
- 5G
- 27.1% avg. -89 dBm 5G signal where 5G coverage exists: avg. -89 dBm
- Fast 5G
- 20.0% avg. -85 dBm Fast 5G signal where Fast 5G coverage exists: avg. -85 dBm
Verizon
- Overall
- 41.7%
- 4G LTE
- 41.7% avg. -100 dBm 4G LTE signal where 4G LTE coverage exists: avg. -100 dBm
- 5G
- 8.4% avg. -93 dBm 5G signal where 5G coverage exists: avg. -93 dBm
- Fast 5G
- 4.8% avg. -87 dBm Fast 5G signal where Fast 5G coverage exists: avg. -87 dBm
AT&T
- Overall
- 41.5%
- 4G LTE
- 41.2% avg. -110 dBm 4G LTE signal where 4G LTE coverage exists: avg. -110 dBm
- 5G
- 22.3% avg. -110 dBm 5G signal where 5G coverage exists: avg. -110 dBm
- Fast 5G
- 13.4% avg. -107 dBm Fast 5G signal where Fast 5G coverage exists: avg. -107 dBm
Coverage varies by neighborhood. Your carrier shouldn’t.
US Mobile lets you switch between all three major networks, so you can choose the one that works best where you actually use your phone.
Pricing, network access, switching terms, and home internet availability may vary.
Coverage by city in Monroe County, FL
Cities and towns are shown for county-level comparison. Coverage percentages use land-area only coverage.
| City | Verizon | AT&T | T-Mobile |
|---|---|---|---|
| Big Coppitt Key, FL | 100.0% 100.0% 94.4% 83.3% | 88.9% 88.9% 88.9% 75.0% | 94.4% 94.4% 94.4% 94.4% |
| Big Pine Key, FL | 100.0% 100.0% 83.5% 55.9% | 90.4% 82.0% 84.6% 21.7% | 88.2% 88.2% 87.1% 75.4% |
| Cudjoe Key, FL | 100.0% 100.0% 90.0% 73.6% | 97.9% 97.9% 94.3% 42.1% | 97.9% 97.9% 97.1% 95.0% |
| Duck Key, FL | 100.0% 100.0% 73.3% 26.7% | 100.0% 100.0% 100.0% 60.0% | 100.0% 100.0% 100.0% 86.7% |
| Islamorada, FL | 100.0% 100.0% 51.8% 36.0% | 99.4% 99.4% 97.6% 76.2% | 98.2% 98.2% 98.2% 98.2% |
| Islamorada, Village of Islands, FL | 100.0% 100.0% 42.2% 31.7% | 99.4% 99.4% 98.3% 79.4% | 99.4% 99.4% 99.4% 99.4% |
| Key Colony Beach, FL | 100.0% 100.0% 100.0% 81.8% | 100.0% 100.0% 90.9% 36.4% | 100.0% 100.0% 100.0% 100.0% |
| Key Largo, FL | 100.0% 100.0% 51.3% 32.2% | 98.8% 98.8% 98.0% 55.1% | 98.8% 96.8% 98.8% 93.3% |
| Key West, FL | 100.0% 100.0% 97.4% 85.8% | 98.7% 98.7% 83.9% 38.1% | 99.4% 99.4% 99.4% 99.4% |
| Layton, FL | 100.0% 100.0% 20.0% 0.0% | 100.0% 100.0% 100.0% 100.0% | 100.0% 100.0% 100.0% 100.0% |
| Long Key, FL | 100.0% 100.0% 34.6% 0.0% | 98.1% 98.1% 98.1% 78.8% | 98.1% 98.1% 98.1% 98.1% |
| Marathon, FL | 100.0% 100.0% 92.3% 83.3% | 93.7% 93.7% 89.6% 64.9% | 93.7% 93.7% 93.7% 93.7% |
| North Key Largo, FL | 100.0% 100.0% 50.8% 33.9% | 98.2% 98.2% 85.2% 41.6% | 99.2% 99.2% 99.2% 90.1% |
| Stock Island, FL | 100.0% 100.0% 95.8% 83.3% | 91.7% 91.7% 58.3% 25.0% | 95.8% 95.8% 95.8% 95.8% |
| Summerland Key, FL | 98.7% 98.7% 69.8% 30.4% | 96.8% 96.8% 92.9% 53.4% | 95.6% 95.6% 95.3% 86.5% |
| Tavernier, FL | 100.0% 100.0% 15.2% 4.5% | 98.5% 98.5% 90.9% 57.6% | 98.5% 98.5% 98.5% 98.5% |
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 Monroe County, FL 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.