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What county is San Juan, TX in?

Updated November 1, 2026 · Data: U.S. Census Bureau

San Juan, Texas is in Hidalgo County.

San Juan at a glance

Population35,6746th largest place in Hidalgo County

Land area12.1 sq mi2,945 people per sq mi

Share of Hidalgo County4%of the county's residents live here

County seatEdinburg8.9 mi from San Juan

Time zoneCentralAmerica/Chicago

Nearest county line18 mito Cameron County

How close is San Juan to a county line?

The center of San Juan (its Census internal point) is about 18 mi from the Cameron County line. Homes near the edge of town can be much closer; if you live near a line, check your address and the lookup will tell you how far you are from it.

What ZIP codes are in San Juan?

1 ZIP codes use the name San Juan or are centered in it. Shares are of each ZIP's land; a ZIP named after a town can reach beyond its city limits.

ZIP	Post office name	County (land share)
78589	San Juan	Hidalgo County

About Hidalgo County

County seat: Edinburg. FIPS code 48215. Population 880,921. All Hidalgo County facts.

Towns near San Juan

Alamo: 2.2 mi away, Hidalgo County
North Alamo: 2.4 mi away, Hidalgo County
Pharr: 3.2 mi away, Hidalgo County
South Alamo: 3.8 mi away, Hidalgo County
Lopezville: 3.9 mi away, Hidalgo County
Murillo: 5.5 mi away, Hidalgo County

San Juan has about 35,674 people. It is an incorporated city or town.

Sources: ACS 2019-2023 5-year (residents by county, table B01003); Census TIGER/Line 2024 and Gazetteer 2024 (land, location); Census 2020 ZCTA file and GeoNames (ZIP codes). Data as of November 1, 2026. Not affiliated with any government agency.

FAQ

Frequently asked questions

What county is San Juan, TX in?

San Juan, Texas is in Hidalgo County. The county seat of Hidalgo County is Edinburg.

What ZIP codes are in San Juan, TX?

78589.

Is San Juan the county seat of Hidalgo County?

No. The county seat is Edinburg, about 8.9 mi away.

What time zone is San Juan, TX in?

Central time (America/Chicago).

How do I know which county my San Juan address is in?

Use the address lookup at your home, or check your appraisal district record.

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CountyFinder is an independent website. It is not affiliated with the U.S. Census Bureau, USPS or any county, state or federal agency. County boundaries are from Census TIGER/Line, published for statistical purposes only: they are not a determination of jurisdictional authority or legal land descriptions. For legal or tax purposes, confirm your county with the county.