Zip Code 51577 — Walnut, IA

ZIP Code 51577 is associated with Walnut, IA, in Pottawattamie County. The listed population estimate is 1,561; estimated density is 7.2 people per square mile. Among records with population estimates, it ranks #10 of 16 in Pottawattamie County and #339 of 969 in IA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (41.464400, -95.202960)

Data MetricLocal Statistic
Postal / Zip Code51577
Primary CityWalnut
State / ProvinceIA
CountyPottawattamie
Total Population1,561
Population Density7.2 people/sq mi
TimezoneAmerica/Chicago

How 51577 Compares

MetricZIP 51577Pottawattamie County recordsIA records
Population estimate1,56192,784 (sum)3,210,984 (sum)
Population Density7.2 /sq mi----
County population rank#10 of 16----
State population rank#339 of 969----

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 IA

ZIP CodeCityDistancePopulation estimate
ZIP 51552Marne4.8 mi169
ZIP 51521Avoca7.4 mi1,953
ZIP 51536Hancock9.9 mi613
ZIP 51531Elk Horn10.4 mi889
ZIP 50022Atlantic10.8 mi8,526

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 →