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 between September 23, 2026 and October 9, 2026.
Sussex, Wisconsin, in Waukesha County, has about 13,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Sussex is held at the county jail, run by the Waukesha 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: Sussex public records, Waukesha County inmate search, Sussex arrest records, Sussex warrants, Sussex criminal records, Sussex court records, Wisconsin arrest records and Wisconsin inmate search.
Finding Someone in Custody in Sussex
The county jail, run by the Waukesha County Sheriff's Office, holds everyone kept in custody after an arrest in Sussex, from every agency.
SearchSystems opened and checked the custody page of the Waukesha County Sheriff's Office at waukeshacounty.gov/sheriff/jail-division/current-inmate-list (page title: Current Inmate List | Waukesha County), which answered when SearchSystems opened it on September 23, 2026.
Someone booked recently shows on that page; someone cited and released at the scene, or held a few hours at a city station, does not.
The Waukesha County Jail by the Numbers
On an average day in 2025 the jail held about 470 people, down from about 500 in 2019. Its rated capacity in 2025 was 807 beds, and it ran at 59 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Waukesha County has about 417,000 residents (2024 Census Bureau estimate), so the jail holds about 11 people for every 10,000 residents.
Who Books People Into the Waukesha County Jail
The Waukesha County Sheriff's Office and the agencies that report for Brookfield (township), Brookfield, Menomonee Falls, New Berlin, Muskego, Oconomowoc and 16 more cities make the arrests that end in a booking in and around Sussex.
The largest arrest counts reported to the FBI were Waukesha's 2,346 for 2025, the Waukesha County Sheriff's Office's 2,041 for 2025 and Brookfield's 791 for 2025.
Together, the 16 agencies in Waukesha County with all twelve months of 2025 on file reported 8,658 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 Sussex arrest records.
From the Jail to State Prison
The jail holds people awaiting trial and people serving short sentences. A person sentenced to prison in Waukesha County serves the sentence in a facility of the Wisconsin Department of Corrections, whose inmate locator is at appsdoc.wi.gov/lop/welcome.
Frequently Asked Questions
How do I find an inmate in Sussex?
Look on the custody page of the Waukesha County Sheriff's Office at waukeshacounty.gov. It covers people booked into the county jail.
How many people are in the Waukesha County jail?
About 470 on an average day in 2025, the latest year in the Vera Institute's jail data, against a rated capacity of 807 beds.
Where do people sentenced to prison in Waukesha County go?
To a facility of the Wisconsin Department of Corrections; its inmate locator is at appsdoc.wi.gov/lop/welcome.
Is this the official Sussex website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.