How to Sign in to Ancestry com with LDS Account? If you have an LDS account, you can easily sign in to Ancestry.com to access exclusive family history resources. To get started, visit the Ancestry sign-in page and select the option to log in with your LDS account. Enter your LDS username and password, and once verified, your account will link to Ancestry. This allows you to explore billions of historical records, build your family tree, and connect with your heritage at no extra cost. Using your LDS account ensures that you enjoy the full benefits of Ancestry’s genealogical tools without creating a separate subscription.