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Middlesex County Middlesex / County
Middlesex County Middlesex / County
While most of Middlesex lies in the metropolitan county of Greater London, the urban districts of Staines and Sunbury-on-Thames lie within the administrative county of Surrey, and Potters Bar in Hertfordshire.
Middlesex is a borough in Middlesex County, in the U.S. state of New Jersey. It is located within the Raritan Valley region.
The county's most populous place, with 107,588 residents as of the 2020 census, is Edison, while Monroe Township covers the largest area of any municipality, at 42.19 square miles (109.3 km2).