South River, New Jersey
South River is a borough in Middlesex County, New Jersey, with 16,118 residents in 2020. It is in New Jersey's 12th congressional district. Its state senate district is State Senate District 18; its state house district is Assembly District 18.
County
| County | Share of residents |
|---|---|
| Middlesex County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| New Jersey's 12th congressional district (NJ-12) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (NJ-12) | Bonnie Watson Coleman (D) | 202-225-5801 | 100% |
| U.S. Senator | Andy Kim (D) | 202-224-4744 | statewide |
| U.S. Senator | Cory A. Booker (D) | 202-224-3224 · contact form | statewide |
| State Senator (State Senate District 18) | Patrick Diegnan (Democratic) | 908-757-1677 | 100% |
| Assembly Member (Assembly District 18) | Robert Karabinchak (Democratic) | 732-548-1406 | 100% |
| Assembly Member (Assembly District 18) | Sterley Stanley (Democratic) | 732-875-3833 | 100% |
Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- South River website: http://www.southrivernj.org/
- South River laws: search for the South River, New Jersey code of ordinances
- Middlesex County laws: search for the Middlesex County, New Jersey code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 18 | 100% |
| State house district | Share of residents |
|---|---|
| Assembly District 18 | 100% |
ZIP codes
Percentages mark ZIPs only partly in South River: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get South River's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:place:3469420")
South River here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.