Health insurance in Middlesex County, Massachusetts

Reviewed September 4, 2026 · 2024 Census data

Source: US Census Small Area Health Insurance Estimates, 2024 release. Income bands are measured against the federal poverty level.

How many here a premium tax credit would reach

Of the 39,075 people without coverage in Middlesex County, 17,188 — 44% — earn inside the premium tax credit range. That is under the 51% median, so proportionally more of Middlesex County's uninsured sit outside the credit — below it or above the cliff. Within that band, only 5.4% are uninsured, so the credit is reaching most of the people it was built for here.

Comparatively few people go uncovered

2.9% of Middlesex County's 1,342,017 under-65 residents have no health coverage — 39,075 people. That is close to the Massachusetts rate of 3.3%, and puts Middlesex County in the bottom quarter of the 3,143 counties measured nationally (3,139th).

Who falls under the Medicaid line

9,569 of Middlesex County's uninsured — 24%, below the 31% typical of counties nationally — earn under $22,025 a year, which in Massachusetts is Medicaid territory rather than marketplace territory.

The years before Medicare

7,582 people aged 50 to 64 in Middlesex County have no coverage, a rate of 2.5% — close to the 2.9% across all under-65 residents here. Age-rated premiums make this the most expensive group to cover before Medicare.

Middlesex County against Massachusetts

Middlesex County is the largest of the 9 Massachusetts counties we publish, by under-65 population. Its uninsured rate tracks the state almost exactly and 2 points fewer of its uninsured sit in the subsidy band than statewide. Coverage among 50 to 64 year olds matches the Massachusetts picture.

The next largest counties

All Massachusetts counties · How the credit works · Enrollment dates