393,995 people (2024 Census estimate, +9.3% since 2020)
841 square miles of land · 469 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 Douglas County in the area they serve, reporting 410,793 people served in all (a system that crosses county lines counts its whole population).
| CASTLE ROCK TOWN OF surface water · local government · CO0118010 | 110,298 served |
| HIGHLANDS RANCH WSD surface water · local government · CO0118015 | 103,444 served |
| PARKER WSD surface water · local government · CO0118040 | 75,949 served |
| MERIDIAN MD buys surface water · private · CO0218015 | 23,415 served |
| STONEGATE MD buys surface water · local government · CO0118076 | 15,295 served |
| ROXBOROUGH WSD surface water · local government · CO0118055 | 13,765 served |
| PINERY WWD buys surface water · local government · CO0118025 | 12,901 served |
| CASTLE PINES NORTH MD buys surface water · local government · CO0118006 | 12,800 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 366 people were held in Douglas County's jail, in Vera's latest figure (2025). In 2020 it was about 267.
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 Douglas County. School taxes are usually the largest part of a property tax bill.
Spent $938.9 million — $810.1 million to run schools, about $12,994 per student, plus $89.5 million on buildings and equipment. Money in: $509.3 million local (mostly property tax), $405.2 million state, $36.1 million federal. Long-term debt: $372.9 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 Moderate compared with other U.S. counties. FEMA estimates natural hazards cost Douglas County about $113.5 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
264 bridges in Douglas County: 139 in good condition, 119 fair, and 6 poor (2.3%). “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.
| PLUM CREEK PARKWAY over SELLARS GULCH · built 1987 | 14,950 vehicles a day |
| HAPPY CANYON ROAD over I 25 ML · built 1965 | 6,760 vehicles a day |
| RAMPART RANGE ROAD over LITTLE WILLOW CREEK · built 1985 | 5,248 vehicles a day |
| SH 83 ML over WEST CHERRY CREEK · built 1968 | 4,400 vehicles a day |
| CR107 (Liggett RD) over I 25 ML · built 1964 | 3,395 vehicles a day |
| SH 105 ML over DRAW · built 1938 | 2,600 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $240.9 million of work in Douglas County in fiscal 2025, about $673 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 Douglas 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 Douglas County built: brayden.ozark@gmail.com.
More of Colorado: the state government and every county in Colorado.
Nearby counties: Jefferson County (24 mi) · Denver County (30 mi) · Teller County (34 mi) · Arapahoe County (39 mi) · El Paso County (40 mi) · Elbert County (43 mi).