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.

Buyers hunting for neighborhoods with high turnover and rental density, young professionals and students, and anyone curious how Census data reshapes the usual Greater Boston pecking order.

• •Cambridge median age 30.6 — #1 of 49 full-coverage municipalities
• •Lawrence is #2 at 31.5; Somerville and Boston near 32–33
• •The metro's youngest-to-oldest spread is 20.4 years (Cambridge 30.6 vs Gloucester 51.0)