Middlesex County
URL: https://knowledge.ivjn.us/en/places/nj-middlesex-county.html

Middlesex County is a county in New Jersey, United States, with county seat New Brunswick.

## Administrative divisions

Middlesex County is a county in New Jersey, United States; the county seat is New Brunswick[^uscb2023].

## Basic facts

- State: [New Jersey](https://knowledge.ivjn.us/en/places/new-jersey.html)
- County seat: New Brunswick[^uscb2023]
- Division level: county[^uscb2023]

## Parent division

Located in [New Jersey](https://knowledge.ivjn.us/en/places/new-jersey.html).

Updated: 2026-10-29

Relations:
- Located in: New Jersey https://knowledge.ivjn.us/en/places/new-jersey.html
- Contains places: Avenel https://knowledge.ivjn.us/en/places/nj-avenel.html
- Contains places: Brownville https://knowledge.ivjn.us/en/places/nj-brownville.html
- Contains places: Carteret https://knowledge.ivjn.us/en/places/nj-carteret.html
- Contains places: Clearbrook Park https://knowledge.ivjn.us/en/places/nj-clearbrook-park.html
- Contains places: Colonia https://knowledge.ivjn.us/en/places/nj-colonia.html
- Contains places: Cranbury https://knowledge.ivjn.us/en/places/nj-cranbury.html
- Contains places: Dayton https://knowledge.ivjn.us/en/places/nj-dayton.html
- Contains places: Concordia https://knowledge.ivjn.us/en/places/nj-concordia.html
- Contains places: Dunellen https://knowledge.ivjn.us/en/places/nj-dunellen.html
- Contains places: East Brunswick https://knowledge.ivjn.us/en/places/nj-east-brunswick.html

Mentioned in:
- New Jersey https://knowledge.ivjn.us/en/places/new-jersey.html
- Avenel https://knowledge.ivjn.us/en/places/nj-avenel.html
- Brownville https://knowledge.ivjn.us/en/places/nj-brownville.html
- Carteret https://knowledge.ivjn.us/en/places/nj-carteret.html
- Colonia https://knowledge.ivjn.us/en/places/nj-colonia.html
- Concordia https://knowledge.ivjn.us/en/places/nj-concordia.html
- Cranbury https://knowledge.ivjn.us/en/places/nj-cranbury.html
- Dayton https://knowledge.ivjn.us/en/places/nj-dayton.html
- Dunellen https://knowledge.ivjn.us/en/places/nj-dunellen.html
- East Brunswick https://knowledge.ivjn.us/en/places/nj-east-brunswick.html

Sources:
- Middlesex County (Wikipedia) https://en.wikipedia.org/wiki/Middlesex_County
- U.S. Census Bureau 2023 FIPS state and county codes https://www.census.gov/library/reference/code-lists/ansi.html