The Youngest Town in Greater Boston: Cambridge Wins the Median-Age Crown by Two Decades
Episode 2 of Greater Boston, Ranked. We measured median age across 49 full-coverage municipalities and found Cambridge's population is 20.4 years younger than Gloucester's. It's not just students — it's the whole ecosystem of a biotech and university magnet.
Cambridge's median age is 30.6 — more than two decades younger than Gloucester's 51.0. We ranked Greater Boston's youngest municipalities on hard Census data and the university hub runs away with it.
Welcome to Greater Boston, Ranked — Episode 2
Not the wealthiest, not the prettiest — the youngest, measured by median age. The answer rearranges the usual Greater Boston hierarchy in a way that says a lot about how universities and biotech reshape a region.
Ask someone to name the "youngest" town around Boston and they might reach for a college town or a transit-rich neighborhood. They're not wrong. But the town that actually tops the list is a university and biotech magnet on the Charles River, where the median resident is 30.6 years old — more than two decades younger than the median resident of Gloucester, the metro's oldest town.
How we measured it
📊The Leaderboard: Greater Boston's 10 Youngest Municipalities
| Rank | Municipality | Median Age | Population |
|---|---|---|---|
1 | Cambridge | 30.6 | 117,962 |
2 | Lawrence | 31.5 | 88,067 |
3 | Somerville | 32.1 | 80,464 |
4 | Boston | 32.9 | 665,945 |
5 | Chelsea | 34.5 | 39,890 |
6 | Lowell | 34.6 | 114,737 |
7 | Waltham | 34.7 | 64,711 |
8 | Brookline | 35.1 | 62,698 |
9 | Malden | 35.4 | 65,463 |
10 | Medford | 35.4 | 61,748 |
Notice the pattern: three of the top four are university towns or transit-rich neighborhoods (Cambridge, Somerville, Boston). Lawrence and Waltham follow, both labor-market magnets that draw young workers. Lowell, Brookline, Malden, and Medford are either older industrial cities or close-in suburbs with rental stock and transit. Age, it turns out, tracks knowledge work and turnover more than it tracks wealth.
🥇The Winner: Cambridge, Median Age 30.6
Cambridge takes the crown — by two decades over the metro average
Cambridge earned this the academic way. It's home to MIT, Harvard, and a gravitational pull for biotech, research, and knowledge-economy jobs that draws young professionals from across the country. The median resident is still working toward tenure, finishing a PhD, or launching a startup. Unlike a college town, Cambridge retains its young cohort even after graduation — the ecosystem keeps them. It's less a transient student population than a sustained magnet for youth and upward mobility.
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Youngest vs. Oldest: Cambridge vs. Gloucester
Cambridge
Gloucester
Why a buyer should care: median age is a proxy for market churn and housing type. Younger towns have higher turnover, more rentals and condos, and price spikes driven by inbound young professionals. Older towns like Gloucester churn slowly, skew toward owned homes, and have inventory driven by estate sales and downsizing. The number on this leaderboard isn't trivia — it's a hint about the kind of housing market you're walking into and how long you might stay.
🔍 See Cambridge's market data
Recent sales, price trends, and the full town profile.
Explore CambridgeThe fine print
Data Sources & Methodology
- U.S. Census Bureau — ACS 2018–2022 5-Year Estimates, Table B01002 (Median Age) — Median age by place for Massachusetts municipalities. (accessed 2026-06-22)
- Boston Property Navigator — Full-coverage municipality pool — 49 Greater Boston cities and towns whose Census place represents the whole municipality (coverage ≥ 90% of 2020 population). Reproducible extractor: scripts/superlatives/extract.py.
Next week: which town is the most Irish in Greater Boston?
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