The Youngest Town in Greater Boston: Cambridge Wins the Median-Age Crown by Two Decades

Cambridge has the youngest population in Greater Boston with a median age of 30.6 — more than 20 years younger than the oldest, Gloucester (51.0). University and biotech magnets dominate the top (Lawrence 31.5, Somerville 32.1, Boston 32.9), while affluent suburbs cluster near the bottom.