| City: | Waterbury, Connecticut |
| Names to Avoid: | Wtby |
| Planning Region: | Naugatuck Vly Planning Region |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 8:16:22 PM |
| Population: | No Population Data |
| Area Code: | 475 |
| Classification: | PO Box |
| Coordinates: | 41.5584, -73.0516 |
| Quick Link: |
ZIP code 06721 is a PO Box-only designation within Waterbury, Connecticut. It doesn't cover a geographic area but instead exists as a point location within ZIP 06702. The post office at Grand Street maintains 136 PO Boxes and serves 66 businesses, making it a downtown commercial mail hub rather than a residential neighborhood.
This isn't a standalone community. Waterbury residents who want a PO Box downtown use this ZIP, while street delivery comes through 06702 and other Waterbury ZIPs. The 114 employees working at 6 local establishments likely include downtown office workers who find a nearby PO Box more convenient than home delivery.
All 41 street-addressed records in this ZIP point to Grand Street with unit designations. This single-address pattern suggests the ZIP serves one building or facility, probably the post office itself and adjacent commercial space. The USPS abbreviation "WTBY" appears as an alias but isn't valid for mailing.
Only Grand Street appears in records, with all addresses using unit designations, indicating a single multi-tenant facility.
ZIP Code 06721 supports both business and residential activity. According to the Business Census (2024), there are 4 business establishments, employing about 132 people with an annual payroll of $5,151,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 189Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 4Source: CBP |
| 1st Quarter Payroll: | $1,367,000Source: CBP |
| Annual Payroll: | $5,151,000Source: CBP |
| # of Employees: | 132Source: CBP |
ZIP Code 06721 is located in Naugatuck Vly Planning Region, Connecticut, within the Waterbury-Shelton, CT Metropolitan Statistical Area (CBSA 47930) and Connecticut's 5th Congressional District. This Metro area has a population of 0 people, about 0.00% of whom live in ZIP Code 06721. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Waterbury-Shelton, CTSource: Census |
| CBSA Number: | 47930Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 0Source: Census |
| MSA: | New York-Northern New Jersey-Long Island, NY-NJ-CT-PASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 05Source: USPS |
| Congressional Land Area: | 1248.16 sq miSource: Census |
| PMSA: | Waterbury, CT PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0980000Source: Census |
| Place Name: | Waterbury city; ConnecticutSource: Census |
We could not locate which school district 06721 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 March 1, 2026.