Middlesex County is a district of New Jersey.
Boundaries: United States Census Bureau, MAF/TIGER Database (https://www.census.gov/geographies/mapping-files/time-series/geo/carto-boundary-file.html) via geoBoundaries, public domain
| Borough of Carteret | no seat recorded | 23 k |
| Borough of Dunellen | no seat recorded | 7 k |
| Borough of Helmetta | no seat recorded | 2 k |
| Borough of Highland Park | no seat recorded | 14 k |
| Borough of Jamesburg | no seat recorded | 6 k |
| Borough of Metuchen | no seat recorded | 14 k |
| Borough of Middlesex | no seat recorded | 14 k |
| Borough of Milltown | no seat recorded | 7 k |
| Borough of Sayreville | no seat recorded | 43 k |
| Borough of South Plainfield | no seat recorded | 23 k |
| Borough of South River | no seat recorded | 16 k |
| Borough of Spotswood | no seat recorded | 8 k |
| City of New Brunswick | New Brunswick | 55 k |
| City of Perth Amboy | no seat recorded | 51 k |
| City of South Amboy | no seat recorded | 9 k |
| Township of Cranbury | no seat recorded | |
| Township of East Brunswick | East Brunswick | |
| Township of Edison | no seat recorded | |
| Township of Monroe | no seat recorded | |
| Township of North Brunswick | no seat recorded | |
| Township of Old Bridge | no seat recorded | |
| Township of Plainsboro | no seat recorded | |
| Township of South Brunswick | no seat recorded | |
| Township of Woodbridge | no seat recorded |
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We show New Brunswick as the capital of Middlesex County. If that is wrong, tell us what it should be and where you read it.
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