Castine, ME 04421 ZIP Code Profile

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Castine, ME

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ZIP Code 04421: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Castine, ME 04421

  • ZIP Code Type: STANDARD
  • County: Hancock County
  • Centroid: Latitude 44.393, Longitude -68.804
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 57
  • PO Box Addresses: 413
  • Residential Addresses: 93
    • Multi-Family Addresses: 1
    • Single Family Addresses: 92

The ZIP Code maps and database are updated 4 times per year.
Database updated: February 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting demographic data.


04421 ZIP Code Map

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Castine, ME 04421 Data & Demographics (As of July 1, 2017)


Total Population 1,357
Daytime Population: Workers 555
Daytime Population: Residents 816
Total Daytime Population (TDP) 1,371
Ratio TDP/Total Population1 1.01
Population in Households 800
Population in Familes 482
Population in Group Qrtrs 557
Population Density2 177
Diversity Index3 13


Median Household Income $60,274
Average Household Income $77,478
Per Capita Income $29,326


Total Housing Units 717 (100%)
Owner Occupied HU 232 (32.4%)
Renter Occupied HU 145 (20.2%)
Vacant Housing Units 340 (47.4%)
Median Home Value $441,935
Average Home Value $501,724


Total Households 377
Average Household Size 2.12
Family Households 187
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.04% 0.0%
Households 0.07% 0.0%
Families -0.22% -0.11%
Median Household Income   0.56%
Per Capita Income   1.02%

Castine, ME 04421 - Peer Comparisons by Rank and Percentile

The table below compares 04421 to the other 399 ZIP Codes in Maine by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 238 41st
Population Density # 68 83rd
Diversity Index # 85 79th
Median Household Income # 67 83rd
Per Capita Income # 129 68th

Additional comparisons and rankings can be made with a VERY EASY TO USE Maine Census Data Comparison Tool.

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