Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. The arrest counts are the ones each agency reported to the FBI, as the FBI held them on October 8, 2026. The jail figures are from the Vera Institute of Justice's Incarceration Trends data. Every office link was opened and checked against the office's own site on September 23, 2026.
Douglas County, Colorado, has about 394,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Douglas County is held at the county jail, run by the Douglas County Sheriff's Office, and the jail's record of each person held is a public record. This guide says where to look for someone in custody, what the jail holds and who books people into it.
This guide covers the search, the jail, who books people, state prison and common questions.
Related guides: Douglas County public records, Douglas County arrest records, Douglas County warrants, Douglas County criminal records, Douglas County court records, Colorado arrest records and Colorado inmate search.
Finding Someone in Custody in Douglas County
A person kept in custody after an arrest in Douglas County is held at the county jail, run by the Douglas County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Douglas County Sheriff's Office at dcsheriff.net/inmates (page title: Inmates | Douglas County Sheriff's Office | Castle Rock Colorado), which answered when SearchSystems opened it on September 23, 2026.
That page is the office's jail information page rather than a roster.
The Douglas County Jail by the Numbers
On an average day in 2025 the jail held about 370 people, up from about 330 in 2019. Its rated capacity in 2025 was 472 beds, and it ran at 77 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Douglas County has about 394,000 residents (2024 Census Bureau estimate), so the jail holds about 9 people for every 10,000 residents.
Who Books People Into the Douglas County Jail
The Douglas County Sheriff's Office and the agencies that report for Castle Rock, Parker and Lone Tree make the arrests that end in a booking in Douglas County.
The Aurora Police Department and the Littleton Police Department are each listed by the FBI across several counties including Douglas County, so their arrests are not broken out for Douglas County here.
The largest arrest counts reported to the FBI were the Douglas County Sheriff's Office's 2,354 for 2025, Lone Tree's 1,722 for 2025 and Castle Rock's 729 for 2025.
Together, the four agencies in Douglas County with all twelve months of 2025 on file reported 5,515 arrests to the FBI that year. Those kept in custody were booked into the county jail; a person cited and released at the scene was not.
The counts, agency by agency and year by year, are in Douglas County arrest records.
From the Jail to State Prison
A sentence of more than a year is served in state prison, not the jail; the Colorado Department of Corrections lists its inmates at cdoc.colorado.gov.
Frequently Asked Questions
How do I find an inmate in Douglas County?
Ask the Douglas County Sheriff's Office; its jail page SearchSystems verified is at dcsheriff.net/inmates.
How many people are in the Douglas County jail?
About 370 on an average day in 2025, the latest year in the Vera Institute's jail data, against a rated capacity of 472 beds.
Where do people sentenced to prison in Douglas County go?
To a facility of the Colorado Department of Corrections; its inmate locator is at cdoc.colorado.gov.
Is this the official Douglas County website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official county, court and state offices described above and does not hold records, charge for them or take requests.