St. Croix County, Wisconsin Genealogy Records

Selected record inventories for St. Croix County, their listed years, and where to ask for access.

Selected inventory review: 2026-11-02. Selected county records checked against the linked official catalog or archive guide. Date spans and access limits are described on the county page. Wisconsin Department of Health Services

Formed
1840
County seat
Hudson
Barron CountyBuffalo CountyChippewa CountyDunn CountyEau Claire CountyPepin CountyPierce CountyPolk CountyTrempealeau CountySt. Croix CountyDunnPepinPiercePolkSt. Croix
St. Croix CountyToday's boundaries ยท U.S. Census Bureau

Listed record inventories

Selected holdings and indexes for St. Croix County, checked against the repository descriptions linked below. Date spans may contain gaps; an index is not a complete set of original records.

Marriages, births and deaths

See the repository's descriptions and search options

Repository access note: Wisconsin Department of Health Services reports the earliest registration year for each type of vital record in this county. This is a starting date, not proof of an unbroken run, a record for a particular person, or online images. The linked state page explains current research access and indexes.

Sources: the catalogs and repository descriptions linked on the entries above. Selected inventories do not establish complete coverage of every record type or online access to original documents. Read the repository access note for source dates and limitations.

Where to find the records

Offices change their hours and access rules; call before you visit.

Boundaries and parent counties

Formed from: Crawford County

Check the parent county for earlier records: Crawford County

Later formed partly from St. Croix County: Bayfield County, Pierce County, Polk County

Fayette (Iowa)Wisconsin TerritoryCrawford (Wis.)ST. Croix (Wis.)ST. Croix (Wis.)Crawford (Wis.)
ST. Croix (Wis.) as created in 1840Where its land was the day beforeToday's boundaryBoundaries: Newberry Library, Atlas of Historical County Boundaries

Records stay with the county that created them. If your ancestor lived here before 1840, search the parent county. The Atlas of Historical County Boundaries shows each boundary change.

Research tip

Wisconsin's county registers of deeds recorded births, marriages and deaths well before statewide registration began in 1907. Older county records are held at the Wisconsin Historical Society's Area Research Centers.