Home > ME > Hancock County > Castine > Zip 04421

Zip Code 04421 — Castine, ME

04421 is a ZIP Code associated with Castine, ME, located within Hancock. The postal region supports an estimated population of 1,362 residents across Data Pending housing units, with a population density of 67.6 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (44.411100, -68.795240)

Data MetricLocal Statistic
Postal / Zip Code04421
Primary CityCastine
State / ProvinceME
CountyHancock
Total Population1,362
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density67.6 people/sq mi
TimezoneAmerica/New_York

How 04421 Compares

MetricZIP 04421Hancock CountyME State Average
Population1,36259,7921,387,734
Median IncomeData PendingN/AN/A
Population Density67.6 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 04617Brooksville4.3 mi651N/A
Zip 04642Harborside5.0 mi202N/A
Zip 04476Penobscot6.2 mi1,154N/A
Zip 04974Searsport8.6 mi2,655N/A
Zip 04676Sedgwick8.7 mi1,130N/A

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 →