Newington Green Unitarian Church (NGUC) in north London is one of England's oldest Unitarian churches. It has had strong ties to political radicalism for over 300 years, and is London's oldest Nonconformist place of worship still in use. It was founded in 1708 by English Dissenters, a community of which had been gathering around Newington Green for at least half a century before that date. The church belongs to the umbrella organisation known as the General Assembly of Unitarian and Free Christian Churches, and has had an upturn in its fortunes since the turn of the millennium.

Newington Green is an open space in North London between Islington and Hackney. It gives its name to the surrounding area, roughly bounded by Ball's Pond Road to the south, Petherton Road to the west, Green Lanes and Matthias Road to the north, and Boleyn Road to the east. The Green is in N16 and the area is covered by the N16, N1 and N5 postcodes. Newington Green Meeting House is situated near the park.