10 Most Populated ZIP Codes in Missouri

The top ZIP code for population in Missouri is 63376 (Saint Peters, St. Charles County), with a population of 74,876. Across the top 10 most populated ZIP codes in Missouri, population ranges from 74,876 to 49,826, covering communities from Saint Peters to O Fallon.

Rank	ZIP	City	County	Population	Population
1	63376	Saint Peters	St. Charles County	74,876	74,876
2	65203	Columbia	Boone County	59,663	59,663
3	65807	Springfield	Greene County	56,680	56,680
4	63021	Ballwin	St. Louis County	56,297	56,297
5	63366	O Fallon	St. Charles County	54,449	54,449
6	63301	Saint Charles	St. Charles County	51,625	51,625
7	63129	Saint Louis	St. Louis County	51,356	51,356
8	63385	Wentzville	St. Charles County	50,420	50,420
9	63031	Florissant	St. Louis County	50,258	50,258
10	63123	Saint Louis	St. Louis County	49,826	49,826

Methodology

Rankings are derived from the U.S. Census Bureau American Community Survey 5-Year Estimates, vintage 2019 to 2023, joined to USPS ZIP Code Tabulation Areas. We rank by population and surface the top 10 ZIP codes within Missouri. Values reflect ZCTA-level estimates and may differ slightly from city-level figures. Compiled and reviewed by the Zip Code Near Me Data Team.

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Reviewed by Zip Code Near Me Data Team. Last verified June 13, 2026.

10 Most Populated ZIP Codes in Missouri

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