Massachusetts Counties

Massachusetts has 14 counties. The largest is Middlesex County (1.6 million people) and the smallest is Nantucket County (14,065). Median home values run from $354K in Hampden County to $3.1M in Nantucket County (Zillow ZHVI 2024). Effective property tax rates range from 0.28% in Nantucket County to 1.62% in Hampden County (Tax Foundation 2023). Median household income is highest in Nantucket County ($136K) and lowest in Hampden County ($67K) (Census ACS 2022). Pick a county below for its full profile, or open the county map to filter by your own ranges.