Washington County, Idaho Genealogy Guide
Washington County, Idaho (Map It) was created on February 20, 1879 from Ada County. Washington County was named in honor of George Washington (1732-1799), first President of the United States (1789-1797). Learn More About State of Idaho History
Washington County is bordered by  Adams County (north), Gem County (east), Payette County (south), Malheur County, Oregon (southwest), Baker County, Oregon (west).
Washington County Cities and Towns include Cambridge, Midvale, Weiser.
Washington County, Idaho Courthouse Records
Washington County, ID Courthouse
The Washington County Courthouse is located in Weiser, Idaho. Learn More About State of Idaho Court, Tax, Land and Probate Records.
Please contact the each clerk's department to confirm mailing address, hours, fees and other information before visiting or requesting information because contact information sometimes changes.  The Clerk's Office DOES NOT DO RESEARCH. The documents are available to interested parties, barring confidential issues. Most staff will assist people in finding the materials, but it is up to the individual to do the research.
The following dates indicates what vital, land, probate, and court records are in Washington county. The date listed for each category of record is usually the earliest registration filed. The earliest date does not indicate that there are numerous records for that year and does not mean that all such events were actually registered.
- Washington County Clerk, Auditor, Recorders Office has Marriage Records from 1879, Land Records from 1873, Probate Records from 1878 and Court Records from 1880. The Recorder is responsible to keep records of all documents recorded in Adams County. Additionally, the Recorder’s office provides marriage licenses, processes passports and records land documents, including plat maps, surveys, easements, assertions of right-of-way, and some types of liens.
Washington County, Idaho Census Records
- Learn More: State of Idaho Census Records
- U.S. Federal Population Schedules: 1880 (free index), 1890 (fragmented), 1900, 1910, 1920, 1930, 1940
- U.S. Federal Census Mortality Schedules: 1880
- Selected U.S. Federal Census Agriculture Schedules: 1880
- Selected U.S. Federal Census Industry Schedules: 1880
- Union Veterans Schedules: 1890
Washington County, Idaho Vital Records
- Learn More: State of Idaho Vital Records
- Birth and Death Records: from July 1911 to present.
- Marriage and Divorce Records: from May 1947 to present.
- Locations:Â Idaho Office of Vital Statistics, 450 W. State St., 1st Floor, Boise, ID 83720; (208) 334-5988
- Vital Records Online:Â USAVital, VitalChek or Social Security Death Index
- Vital Records by Mail:  Birth, Marriage, Divorce and Death Certificates Applications.
Washington County, Idaho Resources
- Snake River Heritage Center
- Washington County, Idaho Message Boards
- Washington County, Idaho Genealogy Forum
- Washington County, Idaho Mailing lists
Washington County, Idaho External Links
