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Genealogy and Family History. Local. National. International.

Jeff Co map boldRecords of people who have lived in Jefferson County, Washington, begin in 1852 and come from a variety of sources. JCGS has cataloged and indexed more than 250,000 records related to Jefferson County. These indexes are FREE and EASY to use on the website.

For those doing research outside of Jefferson County, we have books and resources in the Washington state, United States and Foreign collections in our library. Additionally, there several Online Subscription Databases that are FREE to JCGS Members at the Research Center, including American Ancestors (formerly NEGHS), Ancestry.com, Fold3 (formerly Footnote.com), and Newspaper Archives.

JCGS would be happy to assist you with your research. Go to the Research Request  page for details.