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Zip Code 52557 — Fairfield, IA

ZIP Code 52557 is associated with Fairfield, IA, in Jefferson County. The listed population estimate is 685; estimated density is 989.7 people per square mile. Among records with population estimates, it ranks #6 of 7 in Jefferson County and #591 of 969 in IA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (41.020260, -91.966530)

Data MetricLocal Statistic
Postal / Zip Code52557
Primary CityFairfield
State / ProvinceIA
CountyJefferson
Total Population685
Population Density989.7 people/sq mi
TimezoneAmerica/Chicago

How 52557 Compares

MetricZIP 52557Jefferson County recordsIA records
Population estimate68516,529 (sum)3,210,984 (sum)
Population Density989.7 /sq mi----
County population rank#6 of 7----
State population rank#591 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 52556Fairfield2.1 mi11,448
ZIP 52567Libertyville8.2 mi506
ZIP 52580Packwood9.5 mi711
ZIP 52533Batavia9.6 mi1,201
ZIP 52535Birmingham10.7 mi725

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 →