Ullerentjernet is a small lake located in the municipality of Ringerike in Buskerud, Norway. It is in the Skjærdalsvassdraget watershed formed by a number of smaller streams, rivers, ponds and marshes which drain into Tyrifjord. Ullerentjernet is situated in Holleia, a hilly terrain with a forest switching between spruce and pine.

• List of lakes in Norway