Amphisbaena ridleyi, known by the common names Ridley's worm lizard or the Noronha worm lizard, is a species of amphisbaenian in the family Amphisbaenidae. The species is endemic to the island of Fernando de Noronha off the coast of Brazil. It is one of two indigenous reptiles on the island.

Fernando de Noronha, officially the State District of Fernando de Noronha and formerly known as the Territory of Fernando de Noronha until 1988, is an archipelago in the Atlantic Ocean, part of the State of Pernambuco, Brazil, and located 354 km off the Brazilian coast. It consists of 21 islands and islets, extending over an area of 26 km2 (10 sq mi). Only the eponymous main island is inhabited; it has an area of 18.4 km2 (7.1 sq mi) and a population estimated at 3,101 in 2020. While most of the archipelago is relatively low-lying, there are parts reaching more than 100 m (328 ft) in elevation.