Zip Area Code

Waterloo, California

No ZIP code carries the name of Waterloo, California, in San Joaquin County; the nearest ZIP code is 95212, in area code 209, with 350 as an overlay.

Nearest ZIP
95212
Area codes
209, 350
Time zone
Pacific Time
Coordinates
38.0365, -121.1846

Nearest ZIP codes to Waterloo

This is the ZIP code nearest to Waterloo, each listed with the post office it is named after.

ZIP codePost officeCountyArea codes
95212StocktonSan Joaquin County209, 350

Area codes for Waterloo

  • Area code 209

    In service since 1958. Shares its area with 350. Local calls are dialed with 1 plus ten digits.

  • Area code 350

    In service since November 28, 2022. Shares its area with 209. Local calls are dialed with 1 plus ten digits.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Time zone

Waterloo is in the Pacific Time zone.

Towns near Waterloo