| City: | Castine, Maine |
| Names to Avoid: | Maine Maritime Academy |
| County: | Hancock County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 8:02:42 PM |
| Population: | No Population Data |
| Area Code: | 207 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 44.3879, -68.8003 |
| Quick Link: |
Maine Maritime Academy, established in 1941 to train merchant mariners for the World War II effort, operates under dedicated ZIP code 04420 in Castine, Hancock County. The academy sits on the former Eastern State Normal School campus in this historic coastal village on Penobscot Bay. Students train aboard the TS State of Maine, with the fifth vessel bearing that name expected in 2026. The academy graduated its first class in 1943, producing over 300 officers who served at sea during the war.
Postal records show 3 delivery codes routing mail to Maine Maritime Academy. Census County Business Patterns reports 5 establishments employing 61 workers. This ZIP has been active since before October 2004. Castine is the valid mailing city.
| Establishments: | 5 |
| Employment: | 61 |
| Residential: | 0 |
| Business: | 1 |
Buildings registered in the USPS ZIP+4 database with designated codes for direct mail delivery.
ZIP Code 04420 supports both business and residential activity. According to the Business Census (2024), there are 5 business establishments, employing about 47 people with an annual payroll of $2,649,000. USPS data shows 0 residential mailboxes and 1 business mailboxes, reflecting local delivery coverage.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 1Source: USPS |
| Total Delivery Receptacles: | 72Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 5Source: CBP |
| 1st Quarter Payroll: | $690,000Source: CBP |
| Annual Payroll: | $2,649,000Source: CBP |
| # of Employees: | 47Source: CBP |
ZIP Code 04420 is located in Hancock County, Maine, within the Metropolitan Statistical Area (CBSA ) and Maine's 2nd Congressional District. This area has a population of 0 people, about 0.00% of whom live in ZIP Code 04420. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | --Source: Census |
| CBSA Number: | --Source: Census |
| CBSA Type: | --Source: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 0Source: Census |
| MSA: | Source: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 02Source: USPS |
| Congressional Land Area: | 27557.4 sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 2311230Source: Census |
| Place Name: | Castine CDP; MaineSource: Census |
We could not locate which school district 04420 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.