Zip Code 63123 — Saint Louis, MO

ZIP Code 63123 is associated with Saint Louis, MO, in St. Louis County. The listed population estimate is 49,077; estimated density is 1,521.5 people per square mile. Among records with population estimates, it ranks #4 of 61 in St. Louis County and #11 of 1,021 in MO.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (38.549490, -90.327390)

Data MetricLocal Statistic
Postal / Zip Code63123
Primary CitySaint Louis
State / ProvinceMO
CountySt. Louis
Total Population49,077
Population Density1,521.5 people/sq mi
TimezoneAmerica/Chicago

How 63123 Compares

MetricZIP 63123St. Louis County recordsMO records
Population estimate49,0771,308,579 (sum)6,191,989 (sum)
Population Density1,521.5 /sq mi----
County population rank#4 of 61----
State population rank#11 of 1,021----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in MO

ZIP CodeCityDistancePopulation estimate
ZIP 63126Saint Louis2.8 mi15,452
ZIP 63125Saint Louis2.8 mi33,294
ZIP 63109Saint Louis3.0 mi25,236
ZIP 63119Saint Louis3.0 mi34,181
ZIP 63116Saint Louis4.0 mi42,170

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →