Middlesex ZIP codes — Middlesex County, Massachusetts

Middlesex County is a major city in Massachusetts, with 1,622,896 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates. The median age here is 38.9 years against 39.1 nationally, a slightly younger profile than the country as a whole. At this size the Census also publishes one-year estimates; the five-year values used here are steadier and let you compare against smaller neighbours on the same basis.

Households in Middlesex County earn a median of $126,779 a year, 61.4% above the national figure of $78,538. Household income here is measured before tax and pooled across everyone at the address, which is why it reads higher than typical individual earnings in the same area. Poverty reaches 7.5% of residents here, below the 12.4% national rate.

The typical owner-occupied home in Middlesex County is valued at $687,200, 126.5% above the national figure, while median gross rent runs $2,126 a month, 51.2% above the national figure, or roughly $25,512 across a full year. A household on the local median income would put about 20.1% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is within the standard affordability guideline. The home-price-to-income ratio works out to 5.4×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 61.6% of occupied homes are owner-occupied versus 65% nationally, so the market leans more heavily on renters. The rent line includes utilities paid by the tenant, a definition worth remembering when comparing it against a landlord's quoted rate.

All values below were released by the Census for this exact geography, with no gap-filling on our side. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.