30,882 people (2024 Census estimate, −1.1% since 2020)
608 square miles of land · 51 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.
24 active community water systems list Summit County in the area they serve, reporting 71,520 people served in all (a system that crosses county lines counts its whole population).
| BRECKENRIDGE TOWN OF surface water · local government · CO0159020 | 28,315 served |
| SNAKE RIVER WD groundwater · local government · CO0159105 | 9,900 served |
| SILVERTHORNE TOWN OF groundwater · local government · CO0159095 | 8,400 served |
| COPPER MOUNTAIN CONSOLIDATED MD groundwater · local government · CO0159030 | 5,785 served |
| FRISCO TOWN OF surface water · local government · CO0159055 | 4,495 served |
| DILLON TOWN OF surface water · local government · CO0159035 | 3,254 served |
| DILLON VALLEY DISTRICT surface water · local government · CO0159040 | 3,063 served |
| BUFFALO MOUNTAIN MD groundwater · local government · CO0159025 | 2,650 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 30 people were held in Summit County's jail, in Vera's latest figure (2025). In 2020 it was about 26.
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.
1 school district has its office in Summit County. School taxes are usually the largest part of a property tax bill.
Spent $64.3 million — $59.3 million to run schools, about $16,314 per student, plus $2.1 million on buildings and equipment. Money in: $53.4 million local (mostly property tax), $13.3 million state, $4.2 million federal. Long-term debt: $67.8 million.
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 Low compared with other U.S. counties. FEMA estimates natural hazards cost Summit County about $29.5 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
63 bridges in Summit County: 16 in good condition, 42 fair, and 5 poor (7.9%). “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 70 ML WBND over CORRAL CREEK · built 1979 | 10,000 vehicles a day |
| I 70 ML EBND over SMITH GULCH · built 1977 | 10,000 vehicles a day |
| I 70 ML EBND over GULLER GULCH · built 1977 | 10,000 vehicles a day |
| E. KEYSTONE RD. over SNAKE RIVER · built 1978 | 433 vehicles a day |
| County Road 1813 over Blue River · built 1938 | 10 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $9.9 million of work in Summit County in fiscal 2025, about $320 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.
General election: Tuesday, November 3, 2026. Ballots mailed to voters: 2026-10-02 to 2026-10-09. Drop boxes open: 2026-10-12. In-person voting at voter centers: 2026-10-19 to 2026-11-03. Last day to register and still get a ballot by mail: 2026-10-26. Last suggested day to mail your ballot back: 2026-10-26. Election Day: 2026-11-03. Last day to fix a signature problem: 2026-11-12.
Source: Colorado Secretary of State, Oct. 2, 2026 · Colorado Secretary of State, Sept. 23, 2026 · Colorado Secretary of State — Election Day FAQs
The budget, property tax rates, audits, local officials and offices for Summit 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 Summit County built: brayden.ozark@gmail.com.
More of Colorado: the state government and every county in Colorado.
Nearby counties: Clear Creek County (25 mi) · Eagle County (30 mi) · Lake County (31 mi) · Grand County (34 mi) · Gilpin County (36 mi) · Park County (41 mi).