Middlesex County is a county located in the U.S. state of Connecticut. As of the most recent data available, the county has a population of approximately 155,071 people, with a population density of about 420.25 persons per square mile.
The county spans a total land area of 369.00 square miles (956.00 square kilometers). The administrative center and county seat is Middletown, which often serves as a hub for local governance and services. The largest city within the county by population is Middletown.
Geographically, Middlesex County experiences varied elevations, with its highest point at Lake Pocotopaug 470 ft and its lowest point at Saybrook Manor 7 ft. The region operates in the UTC-5.