Home > ME > Hancock County > Castine > Zip 04421

Zip Code 04421 — Castine, ME

ZIP Code 04421 is associated with Castine, ME, in Hancock County. The listed population estimate is 1,362; estimated density is 67.6 people per square mile. Among records with population estimates, it ranks #12 of 39 in Hancock County and #228 of 417 in ME.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (44.411100, -68.795240)

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

How 04421 Compares

MetricZIP 04421Hancock County recordsME records
Population estimate1,36259,792 (sum)1,387,734 (sum)
Population Density67.6 /sq mi----
County population rank#12 of 39----
State population rank#228 of 417----

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 ME

ZIP CodeCityDistancePopulation estimate
ZIP 04617Brooksville4.3 mi651
ZIP 04642Harborside5.0 mi202
ZIP 04476Penobscot6.2 mi1,154
ZIP 04974Searsport8.6 mi2,655
ZIP 04676Sedgwick8.7 mi1,130

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 →