Home > MO > Marion County > Hannibal > Zip 63401

Zip Code 63401 — Hannibal, MO

ZIP Code 63401 is associated with Hannibal, MO, in Marion County. The listed population estimate is 21,489; estimated density is 74.8 people per square mile. Among records with population estimates, it ranks #1 of 6 in Marion County and #87 of 1,021 in MO.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (39.690460, -91.459860)

Data MetricLocal Statistic
Postal / Zip Code63401
Primary CityHannibal
State / ProvinceMO
CountyMarion
Total Population21,489
Population Density74.8 people/sq mi
TimezoneAmerica/Chicago

How 63401 Compares

MetricZIP 63401Marion County recordsMO records
Population estimate21,48934,269 (sum)6,191,989 (sum)
Population Density74.8 /sq mi----
County population rank#1 of 6----
State population rank#87 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 63459New London8.5 mi4,423
ZIP 63461Palmyra9.0 mi5,446
ZIP 63467Saverton10.7 mi19
ZIP 63436Center13.9 mi1,199
ZIP 63456Monroe City14.4 mi4,749

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 →