464,151 people (2024 Census estimate, +0.1% since 2020)
617 square miles of land · 752 people per square mile
“Highest” and “lowest” are just order, not grades: a high rank for poverty or hazard losses means more of it. Each figure's source is in its section below.
29 active community water systems list Hampden County in the area they serve, reporting 428,359 people served in all (a system that crosses county lines counts its whole population).
| SPRINGFIELD WATER AND SEWER COMMISSION surface water · local government · MA1281000 | 169,170 served |
| CHICOPEE WATER DEPT (MWRA) buys surface water · local government · MA1061000 | 55,560 served |
| WESTFIELD DPWWATER DIVISION surface water · local government · MA1329000 | 41,094 served |
| HOLYOKE WATER WORKS surface water · local government · MA1137000 | 37,838 served |
| WEST SPRINGFIELD DPW WATER DIVISION groundwater · local government · MA1325000 | 28,835 served |
| AGAWAM WATER DEPARTMENT buys surface water · local government · MA1005000 | 28,692 served |
| EAST LONGMEADOW DPW WATER DEPT buys surface water · local government · MA1085000 | 16,358 served |
| LONGMEADOW WATER DEPT buys surface water · local government · MA1159000 | 15,853 served |
Source: U.S. EPA Safe Drinking Water Information System (SDWIS), active community systems, . Look up any system's violations and test results with EPA's search using its ID.
About 1,102 people were held in Hampden County's jail, in Vera's latest figure (2025). In 2020 it was about 768.
Source: Vera Institute of Justice, Incarceration Trends (built from federal Bureau of Justice Statistics jail surveys). Counties without their own jail, or that share one, may show no figure.
14 school districts have their office in Hampden County. School taxes are usually the largest part of a property tax bill.
Spent $828.4 million — $729.6 million to run schools, about $30,562 per student, plus $84.6 million on buildings and equipment. Money in: $13.7 million local (mostly property tax), $545.2 million state, $104.3 million federal. Long-term debt: $144.8 million.
Spent $160.8 million — $157.3 million to run schools, about $23,361 per student, plus $149,000 on buildings and equipment. Money in: $37.5 million local (mostly property tax), $98.5 million state, $17.1 million federal. Long-term debt: $24.6 million.
Spent $164.8 million — $155.6 million to run schools, about $30,830 per student, plus $3 million on buildings and equipment. Money in: $3.6 million local (mostly property tax), $109 million state, $30.1 million federal. Long-term debt: $8.2 million.
Spent $117.2 million — $99 million to run schools, about $20,230 per student, plus $14.8 million on buildings and equipment. Money in: $38.6 million local (mostly property tax), $53 million state, $11.1 million federal. Long-term debt: $42.9 million.
Spent $84.5 million — $79.9 million to run schools, about $20,525 per student, plus $265,000 on buildings and equipment. Money in: $22.2 million local (mostly property tax), $55.3 million state, $11.1 million federal.
Spent $85.1 million — $81.5 million to run schools, about $23,342 per student, plus $1.1 million on buildings and equipment. Money in: $43.1 million local (mostly property tax), $32.3 million state, $7.6 million federal. Long-term debt: $7.1 million.
Spent $61 million — $58.8 million to run schools, about $20,378 per student, plus $141,000 on buildings and equipment. Money in: $38.8 million local (mostly property tax), $20.8 million state, $5.4 million federal.
Spent $58.3 million — $54.6 million to run schools, about $19,409 per student, plus $522,000 on buildings and equipment. Money in: $41.2 million local (mostly property tax), $13.4 million state, $3.5 million federal. Long-term debt: $27.3 million.
And 6 more.
Source: U.S. Census Bureau, 2023 Annual Survey of School System Finances. Districts are listed by the county of their main office; some serve neighboring counties too.
Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute), which gathers federal data (CDC, Census, and others); measures cover different recent years. Blank lines aren't reported for small counties.
Overall risk: Relatively Moderate compared with other U.S. counties. FEMA estimates natural hazards cost Hampden County about $106.7 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
429 bridges in Hampden County: 65 in good condition, 332 fair, and 32 poor (7.5%). “Poor” means a main part — the deck, the beams, or the supports — is rated 4 or lower on the federal 0–9 scale. It doesn't mean unsafe to drive; unsafe bridges are closed.
| I 291 CONN B & C over HWY DWIGHT ST · built 1967 | 78,178 vehicles a day |
| I 90 EB over HWY LITTLE ALUM PD RD · built 1957 | 47,303 vehicles a day |
| HWY ROOSEVELT AV over I 291 /US20 · built 1969 | 42,672 vehicles a day |
| I 391 over ST116 CHICOPEE ST · built 1979 | 35,950 vehicles a day |
| HWY ARMORY ST over RR CSX · built 1934 | 35,000 vehicles a day |
| HWY ST JAMES AVE over RR CSX · built 1956 | 34,300 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $319.9 million of work in Hampden County in fiscal 2025, about $687 per resident — to the county, cities, schools, hospitals, nonprofits and others.
Source: USAspending.gov, grants by place of performance, fiscal 2025 (Oct. 2024 to Sept. 2025). Search it by county to see each award.
From Grants.gov: posted grants listing county governments as eligible, soonest deadline first; research-only and overseas programs left out; list updated 2026-10-13, refreshed weekly. 62 are open in all. Cities, towns, school districts and nonprofits have their own lists there.
State election: Tuesday, November 3, 2026. Early voting: 2026-10-17 to 2026-10-30. Last day to register to vote: 2026-10-24. Mail ballot request deadline: 2026-10-27. Election Day: 2026-11-03. Last day for mailed ballots to arrive: 2026-11-06.
Source: Secretary of the Commonwealth, 2026 Information for Voters, p. 4 · Cambridge Election Commission, 2026 State Election guide (return deadlines) · Mass. General Laws ch. 54, sec. 93
The budget, property tax rates, audits, local officials and offices for Hampden County come from the county's own records, which we haven't gathered — not gathered, never hidden. See what a full county site looks like, or ask to have Hampden County built: brayden.ozark@gmail.com.
More of Massachusetts: the state government and every county in Massachusetts.
Nearby counties: Hampshire County (14 mi) · Capitol Planning Region, CT (22 mi) · Franklin County (31 mi) · Berkshire County (34 mi) · Northwest Hills Planning Region, CT (36 mi) · Worcester County (38 mi).