Princeton has joined Newark as the first two communities in the state to mark Indigenous Peoples Day on what traditionally has been Columbus Day. Earlier this month, Princeton's mayor and municipal council passed a resolution that declares the second Monday in October as Indigenous Peoples Day out of observance of at least three Native American tribes with historic roots in New Jersey, which only recently received official recognition.

In November 2018, the state acknowledged it has officially recognized the Nanticoke Lenni-Lenape Tribal Nation (with 3,000 members) as an American Indian Tribe since 1982. In March, New Jersey entered into separate settlement agreements with the Powhatan Renape Nation and the Ramapough Lenape Nation, as the state acknowledged that it officially has recognized the two American Indian Tribes since 1980.