Lost Cousins

LostCousins is a family history website that helps people find living relatives who are researching the same ancestors. Designed for people who want to explore their family tree while keeping personal information private, the service uses automated matching based on relatives recorded in selected US, Canadian, British, and Irish census records. Members enter relevant family details and search for potential matches; their information remains hidden from other users, and the site says its matching system is designed to provide accurate results.

Connecting with a “lost cousin” can help members share family photographs, stories, and research that may not be available in public records. The site also encourages collaboration to investigate shared research challenges and overcome gaps in family histories. Alongside its matching service, LostCousins provides help and advice, frequently asked questions, census links, and genealogy resources. Members can receive a free newsletter featuring research tips, articles, and masterclasses on topics such as DNA. The site also offers membership registration and account tools, including password and email address updates.