Oakville, MO ZIP Code
Oakville, Missouri has one ZIP code: .
Mail addressed to Oakville covers nearby places too.
Where the 63129 ZIP code reaches
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Dashed line: the Oakville Census outline.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in Oakville
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Why your mail may say Oakville when you live outside it
Oakville ZIP codes also cover Mehlville, so a letter addressed to Oakville can go to a home outside the town.
A ZIP code does not set your city, school district or tax. St. Louis County property records show which city you are in.
Oakville ZIP code questions
What is the main ZIP code for Oakville?
63129, the ZIP code of the main South County post office at 5636 Telegraph Rd.
What county is Oakville in?
St. Louis County.
ZIP codes for towns near Oakville
More towns near Oakville: O'Fallon, Florissant, St. Charles, St. Peters, O'Fallon, Wentzville, Cape Girardeau, Springfield, Jefferson City.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections