Cell towers in Mercer Island, Washington
The FCC register lists 7 antenna structures in and around Mercer Island. That is the 77th highest count of any place in Washington.
Overview
7 antenna structures are registered with the FCC in Mercer Island, WA.
Density works out to 1.10 registered structures per square mile of land area.
The tallest structure on the register here is 42 m (138 ft) above ground level.
The largest registered owner here is T-mobile West LLC, which holds 3 of them — 42.9% of the local total. Owner is not the same as carrier: tower companies lease space on their structures to several networks at once.
The oldest structure on file here was registered in 2000, the newest in 2019 — 19 years of build-out visible in one register.
Structure types
| Pole | 3 | 43% |
| Utility pole | 1 | 14% |
| Tank | 1 | 14% |
| Building with tower | 1 | 14% |
| Building with antenna | 1 | 14% |
Largest registered owners
owner is not the same as carrier| T-mobile West LLC Carrier | 3 | 43% |
| City of Mercer Island Government | 1 | 14% |
| Day Management CORP. Dba Day Wireless Systems Other | 1 | 14% |
| Seattle Smsa Limited Partnership Carrier | 1 | 14% |
| Ccatt LLC Tower company | 1 | 14% |
Tallest registered structures
| Height | Type | Built | Owner | ASR |
|---|---|---|---|---|
| 42 m (138 ft) | Building with tower | 2019 | Day Management CORP. Dba Day Wireless Systems | 2708658 |
| 37 m (120 ft) | Tank | 2016 | T-mobile West LLC | 2696640 |
| 34 m (110 ft) | Pole | 2004 | Ccatt LLC | 2679727 |
| 34 m (110 ft) | Pole | 2013 | Seattle Smsa Limited Partnership | 2684970 |
| 28 m (92 ft) | Utility pole | 2011 | T-mobile West LLC | 2667672 |
| 23 m (75 ft) | Pole | 2000 | City of Mercer Island | 2610474 |
| 15 m (49 ft) | Building with antenna | 2016 | T-mobile West LLC | 2701556 |
When they were registered
| 2000s | 2 | 29% |
| 2010s | 5 | 71% |
Nearby places
About this data
Figures are drawn from the FCC's public antenna structure register (2026-08-23). It covers structures that need registering — broadly those over 200 feet or close to an airport — and not the many shorter installations that carry mobile traffic.
The FCC Antenna Structure Registration database covers structures that require registration — generally those over 200 feet or near airports. Many small cells, rooftop antennas and short towers are not registered and will not appear here.
"Owner" is the entity that registered the structure, usually a tower company such as American Tower or Crown Castle. It does not indicate which carriers operate equipment on the structure.