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City Limits Checker

Am I inside the Tomball city limits? Enter an address to find out.

Am I Inside the Tomball City Limits?

Tomball ZIP codes cover more ground than the city itself — 77375 and 77377 reach well into unincorporated Harris County. Enter an address to see whether it falls inside the city limits.

For reference only. Boundaries change with annexation. Confirm with the City of Tomball or Harris County for anything official.

Whether an address is inside the city limits decides more than it looks like it does: who provides your water and trash service, which police department answers a call, whose permits and ordinances apply to your property, whether you pay city sales and property tax, and whether you can vote in Tomball city elections. Plenty of homes with a Tomball mailing address sit in unincorporated Harris County — including a few pockets completely surrounded by the city outline, which is why the map above has holes in it.

City limits boundary last updated April 29, 2026. Source: H-GAC City Boundaries (Houston-Galveston Area Council), which maps the interior holes for unincorporated islands inside the city outline. Address lookups are geocoded by Nominatim/OpenStreetMap and can be off for new construction or unusual addresses.