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ZIP codes

ZIP codes in St. Louis city, Missouri

St. Louis city has 28 ZIP codes. 18 lie entirely inside it and 10 are shared with neighboring counties, so part of their land and their people are elsewhere. About 290,920 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes
28
2 more just touch the border (under 1% of their land)
Entirely inside
18
99% or more of their land
Shared with other counties
10
Most with St. Louis County (10)
Most populated ZIP
63116
42,170 people · St. Louis
Least populated ZIP
63102
2,882 people · St. Louis; 1 more with nobody living there
Largest ZIP by land
63110
6.6 sq mi · St. Louis

Map of the ZIP codes in St. Louis city

Madison County, IL St. Clair County, IL St. Louis County 63101 · St. Louis · 3,130 people · 100% in the county 63102 · St. Louis · 2,882 people · 100% in the county 63103 · St. Louis · 8,778 people · 100% in the county 63104 · St. Louis · 19,007 people · 100% in the county 63105 · Clayton · 18,875 people · 4.3% in the county 63106 · St. Louis · 6,751 people · 100% in the county 63107 · St. Louis · 8,909 people · 100% in the county 63108 · St. Louis · 21,336 people · 100% in the county 63109 · St. Louis · 25,236 people · 100% in the county 63110 · St. Louis · 17,645 people · 100% in the county 63111 · St. Louis · 18,851 people · 100% in the county 63112 · St. Louis · 17,985 people · 100% in the county 63113 · St. Louis · 10,221 people · 100% in the county 63115 · St. Louis · 14,488 people · 100% in the county 63116 · St. Louis · 42,170 people · 100% in the county 63117 · Richmond Heights · 9,261 people · 5.6% in the county 63118 · St. Louis · 25,913 people · 100% in the county 63119 · Webster Groves · 34,181 people · 0.9% in the county 63120 · St. Louis · 6,790 people · 94% in the county 63123 · Affton · 49,077 people · 5.0% in the county 63125 · Lemay · 33,294 people · 1.5% in the county 63130 · University City · 28,910 people · 2.0% in the county 63133 · Pagedale · 6,569 people · 0.9% in the county 63136 · Jennings · 40,929 people · 4.0% in the county 63137 · Bellefontaine Neighbors · 19,684 people · 15% in the county 63138 · Spanish Lake · 18,233 people · 1.0% in the county 63139 · St. Louis · 21,631 people · 100% in the county 63143 · Maplewood · 8,975 people · 26% in the county 63147 · St. Louis · 8,173 people · 100% in the county 63155 · St. Louis · 0 people · 100% in the county
  • Entirely in the county (99% or more of its land)
  • Shared, mostly in this county
  • Shared, mostly in other counties
  • Neighboring counties
Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in St. Louis city

28 ZIP codes in St. Louis city, MO, by number
ZIP code Main city Population Land in the county Residents in the county
63101 St. Louis 3,130 100% 3,130
63102 St. Louis 2,882 100% 2,882
63103 St. Louis 8,778 100% 8,778
63104 St. Louis 19,007 100% 19,007
63105 Clayton 18,875 4.3% ≈ 1,032
63106 St. Louis 6,751 100% 6,751
63107 St. Louis 8,909 100% 8,909
63108 St. Louis 21,336 100% 21,336
63109 St. Louis 25,236 100% 25,236
63110 St. Louis 17,645 100% 17,645
63111 St. Louis 18,851 100% 18,851
63112 St. Louis 17,985 100% 17,985
63113 St. Louis 10,221 100% 10,221
63115 St. Louis 14,488 100% 14,488
63116 St. Louis 42,170 100% 42,170
63117 Richmond Heights 9,261 5.6% ≈ 630
63118 St. Louis 25,913 100% 25,913
63120 St. Louis 6,790 94% ≈ 6,144
63123 Affton 49,077 5.0% ≈ 2,973
63125 Lemay 33,294 1.5% ≈ 630
63130 University City 28,910 2.0% ≈ 790
63136 Jennings 40,929 4.0% ≈ 2,825
63137 Bellefontaine Neighbors 19,684 15% ≈ 608
63138 Spanish Lake 18,233 1.0% ≈ 54
63139 St. Louis 21,631 100% 21,631
63143 Maplewood 8,975 26% ≈ 1,443
63147 St. Louis 8,173 100% 8,173
63155 St. Louis 0 100% 0

They also touch the county with under 1% of their land, so they aren’t counted: 63119 and 63133.

ZIP codes shared with other counties

These 10 ZIP codes have part of their land in another county. The first figure is the share of their land in St. Louis city; then, where the rest lies.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are St. Louis (19), Affton (1), Bellefontaine Neighbors (1), Clayton (1), Jennings (1), and Lemay (1); 10 places in all.

All 28 start with the same three digits, 631: the prefix of the USPS sorting center that handles them.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

  • U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
  • U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
  • U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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