ZIP Code 06503 in New Haven, CT

Data Last Updated: January 1, 2026
City:New Haven, Connecticut
Names to Avoid:
N Haven
Planning Region:South Central Ct Planning Region
Timezone:Eastern (GMT -05:00)
Local Time:10:12:27 PM
Population:No Population Data
Area Codes:203 / 475
Classification:PO Box
Coordinates:41.3083, -72.9287
Quick Link:
https://www.zip-codes.com/zip-code/06503/zip-code-06503.asp

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In the United States, a county equivalent is a political or administrative subdivision of a state. It has a specific geographic area and some level of governmental authority. The term "county" is used in 47 states. Alaska, Louisiana, and Connecticut have functionally equivalent subdivisions called Boroughs, Parishes, and Planning Regions, respectively. They functionally act like counties by subdividing the state. Read More about Connecticut Planning Regions: Connecticut changes from Counties to Planning Regions, including a ZIP Code to Historical County Crosswalk file.

06503 - New Haven, CT

ZIP Code 06503, New Haven

Small Town Unique ZIP No Census Data
LocationSouth Central Ct County, CT
Area0 sq mi Single Point
Delivery Points19 (7 businesses)
PO Boxes12
Also Known AsN Haven
ZIP CreatedBefore Oct 2004
Enclosed InZIP Code 06510
Key Facts
  • This ZIP code covers just one street (Chapel Street) in downtown New Haven
  • The post office maintains 12 PO Boxes and serves 7 local businesses
  • Street delivery is available through one city carrier route with 17 delivery points
  • ZIP 06503 is nested within the larger 06510 ZIP code that surrounds it
  • The area falls within Central New Haven and the Downtown neighborhood
  • Both PO Box and standard street delivery options are available to customers

Delivery Options

The post office maintains one city carrier route covering Chapel Street, where 17 delivery points receive standard street service. The PO Box component exists alongside this street delivery rather than replacing it. People in this part of New Haven aren't limited to PO Boxes; they have the option of either service method depending on their needs.

Street Name Patterns

Single Street Focus

This ZIP serves exclusively Chapel Street, one of downtown New Haven's central corridors, with delivery points that include unit-based addresses.

Nearby Areas

Central New Haven Downtown Wooster Square / Mill River Long Wharf Hill

Business & Employment Statistics


ZIP Code 06503 is designated for PO Box delivery only; business establishment and employment data are not available.

# Residential Mailboxes:0Source: USPS
# Business Mailboxes:0Source: USPS
Total Delivery Receptacles:19Source: USPS
Single Family Delivery Units:0Source: USPS
Multi Family Delivery Units:0Source: USPS
# of Businesses:0Source: CBP
1st Quarter Payroll:$0Source: CBP
Annual Payroll:$0Source: CBP
# of Employees:0Source: CBP

Geography, Land Area, & Statistical Classifications


ZIP Code 06503 is located in South Central Ct Planning Region, Connecticut, within the New Haven, CT Metropolitan Statistical Area (CBSA 35300) and Connecticut's 3rd Congressional District. This Metro area has a population of 566,803 people, about 0.00% of whom live in ZIP Code 06503. It covers 0 sq mi of land and a water area of 0 sq mi.

CBSA Name:New Haven, CTSource: Census
CBSA Number:35300Source: Census
CBSA Type:MetroSource: Census
CBSA Division:--Source: Census
CBSA Population:566,803Source: Census
MSA:New York-Northern New Jersey-Long Island, NY-NJ-CT-PASource: Census
Land Area:--Source: Census
Water Area:--Source: Census
Congressional District:03Source: USPS
Congressional Land Area:470.34 sq miSource: Census
PMSA:Waterbury, CT PMSASource: Census
Intro Date:< 2004-10Source: ZIP-Codes.com
Place FIPS Code:0952000Source: Census
Place Name:New Haven city; ConnecticutSource: Census

Adjacent & Nearby ZIP Codes


06504 | | 06502

Schools in ZIP Code 06503


We could not locate which school district 06503 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.

Flexschool 97 Whitney Ave
New Haven, CT 65101
District: Private SchoolNearby
St Martin De Porres Academy 208 Columbus Ave
New Haven, CT 06519
District: Private SchoolNearby
The Foote School 50 Loomis Pl
New Haven, CT 06511
District: Private SchoolNearby

Colleges & Post Secondary Schools near ZIP Code 06503


Yale University Woodbridge Hall
New Haven, CT 06520
Type: Post Secondary
Gateway Community College 20 Church Street
New Haven, CT 06510
Type: Post Secondary
Relay Graduate School Of Education - Connecticut 370 James Street 2nd Floor
New Haven, CT 06513-3089
Type: Post Secondary
Relay Graduate School Of Education - Connecticut 370 James Street 2nd Floor
New Haven, CT 06513-3089
Type: Post Secondary
Albertus Magnus College 700 Prospect St
New Haven, CT 06511-1189
Type: Post Secondary
Southern Connecticut State University 501 Crescent Street
New Haven, CT 06515-1355
Type: Post Secondary

Sources & References


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 January 1, 2026.

  1. U.S. Postal Service [Last Updated: 1/1/2026], https://www.usps.com
  2. ZIP-Codes.com Proprietary Data Enhancements [Updated: 1/1/2026], https://www.zip-codes.com
  3. U.S. Census [Updated: Varies], https://www.census.gov
    • U.S. Census Office of Management and Budget [Updated: As Released]
    • U.S. Census 2020 Demographic & Housing Characteristics (DHC) [Decennial] [Updated: 5/25/2023]
    • U.S. Census 2011-2024 American Community Survey 5-year estimates (ACS) [Annually] [Updated: Annually, As Released]
    • U.S. Census Business Patterns (CBD) [Annually] [Updated: Annually, As Released]
    • U.S. Census American National Standards Institute (ANSI) [Updated: As Released]
  4. U.S. Geological Survey [Updated: Varies], https://www.usgs.gov
  5. Centers for Medicare & Medicaid Services [Updated: Annually, As Released], https://www.cms.gov
  6. National Center for Education Statistics [Updated: 1/1/2026], https://nces.ed.gov