| City: | Hartford, Connecticut |
| Planning Region: | Capitol Planning Region |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 8:12:13 PM |
| Population: | No Population Data |
| Area Codes: | 860 / 959 |
| Classification: | PO Box |
| Coordinates: | 41.7638, -72.6859 |
| Quick Link: |
ZIP code 06123 serves Connecticut's State Capitol complex in downtown Hartford. All 109 street delivery records point to a single address: State House Square. This isn't a residential ZIP. It's a dedicated mail routing code for state government offices.
The post office maintains 142 PO Boxes alongside 51 business delivery points. With zero residential population, every box serves government agencies, legislative offices, or organizations with business at the Capitol. The ZIP uses UNIT designators for internal routing, directing mail to specific offices within the complex.
This point-only ZIP sits within the boundaries of 06103, Hartford's main downtown ZIP code. Residents and most businesses use 06103 for their mail. ZIP 06123 exists specifically for Capitol-related mail volume. Street delivery routes from 06103 cover the surrounding Downtown, Sheldon Charter Oak, and Frog Hollow neighborhoods.
Mail addressed to Connecticut state government offices often uses 06123. For personal mail to downtown Hartford addresses, use 06103 instead.
Single address serves entire ZIP, with UNIT designators routing mail to specific offices within the State Capitol complex.
ZIP Code 06123 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: | 791Source: 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 |
ZIP Code 06123 is located in Capitol Planning Region, Connecticut, within the Hartford-West Hartford-East Hartford, CT Metropolitan Statistical Area (CBSA 25540) and Connecticut's 1st Congressional District. This Metro area has a population of 1,212,381 people, about 0.00% of whom live in ZIP Code 06123. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Hartford-West Hartford-East Hartford, CTSource: Census |
| CBSA Number: | 25540Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 1,212,381Source: Census |
| MSA: | Hartford, CT MSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 01Source: USPS |
| Congressional Land Area: | 675.45 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0937000Source: Census |
| Place Name: | Hartford city; ConnecticutSource: Census |
We could not locate which school district 06123 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.