| City: | Sergeantsville, New Jersey |
| City Alias: | Sergeantsvlle |
| County: | Hunterdon County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 8:26:27 PM |
| Population: | No Population Data |
| Area Code: | 908 |
| Classification: | PO Box |
| Coordinates: | 40.4458, -74.9437 |
| Quick Link: |
Sergeantsville operates as a small Hunterdon County community centered around PO Box service. The post office maintains 84 PO Boxes serving local residents and businesses, though it's technically classified as a PO Box only ZIP. The single street with carrier delivery is Rosemont Ringoes Road, which has just two delivery points recorded in the postal system.
This is one of New Jersey's smaller postal facilities. The 40 businesses operate alongside the named Postmaster building that anchors the postal service. While the ZIP itself has minimal street delivery infrastructure, residents who need carrier delivery typically receive it through the neighboring ZIP 08559, which geographically encloses this area. The community sits at the crossroads of rural Hunterdon County, where PO Box service often supplements limited carrier routes in scattered settlements.
The single recorded street connects this small community to the neighboring settlements of Rosemont and Ringoes, reflecting the scattered rural character of western Hunterdon County.
ZIP Code 08557 supports both business and residential activity. According to the Business Census (2024), there are 14 business establishments, employing about 121 people with an annual payroll of $7,513,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 119Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 14Source: CBP |
| 1st Quarter Payroll: | $1,792,000Source: CBP |
| Annual Payroll: | $7,513,000Source: CBP |
| # of Employees: | 121Source: CBP |
ZIP Code 08557 is located in Hunterdon County, New Jersey, within the New York-Newark-Jersey City, NY-NJ Metropolitan Statistical Area (CBSA 35620) and New Jersey's 7th Congressional District. This Metro area has a population of 18,897,109 people, about 0.00% of whom live in ZIP Code 08557, and is subdivided into the Newark, NJ division. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | New York-Newark-Jersey City, NY-NJSource: Census |
| CBSA Number: | 35620Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | Newark, NJ (CBSA Div 35084)Source: Census |
| CBSA Population: | 18,897,109Source: Census |
| MSA: | New York-Northern New Jersey-Long Island, NY-NJ-CT-PASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 07Source: USPS |
| Congressional Land Area: | 970.19 sq miSource: Census |
| PMSA: | Middlesex-Somerset-Hunterdon, NJ PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
ZIP Code 08557 is in the Delaware Township School District, which serves grades Kindergarten thru 8th. There are 1 public school(s) in this ZIP Code, and we have located 3 private school(s). 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.