As of the 2020 census, the population was 1,632,002, [1] making it the most populous county in both massachusetts and new england and the 20th most populous county in the united states. The county consists of an upland region drained by the merrimack, nashua, assabet, concord, sudbury, and shawsheen rivers View the town's strategic plan sign up for emergency alerts town of essex, ma essex town hall 30 martin street home website disclaimer
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Middlesex, county, northeastern massachusetts, u.s., west and northwest of boston and bordered on the north by new hampshire