Zip Code 51527 — Defiance, IA

ZIP Code 51527 is associated with Defiance, IA, in Shelby County. The listed population estimate is 362; estimated density is 3.3 people per square mile. Among records with population estimates, it ranks #8 of 10 in Shelby County and #762 of 969 in IA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (41.828750, -95.348000)

Data MetricLocal Statistic
Postal / Zip Code51527
Primary CityDefiance
State / ProvinceIA
CountyShelby
Total Population362
Population Density3.3 people/sq mi
TimezoneAmerica/Chicago

How 51527 Compares

MetricZIP 51527Shelby County recordsIA records
Population estimate36211,310 (sum)3,210,984 (sum)
Population Density3.3 /sq mi----
County population rank#8 of 10----
State population rank#762 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 51530Earling5.1 mi809
ZIP 51578Westphalia7.9 mi116
ZIP 51454Manilla8.1 mi1,254
ZIP 51446Irwin8.8 mi499
ZIP 51528Dow City10.4 mi674

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 →