Clare Rewcastle Brown (born 20 June 1959) is a British environmental and anti-corruption activist, author, blogger and advocate journalist. Born in the former British Crown Colony of Sarawak (now part of Malaysia), she is the founder and operator of the Sarawak Report blog and pirate radio station Radio Free Sarawak which are openly critical of the Barisan Nasional-led state and federal governments of Sarawak and Malaysia. In 2017, her blog Sarawak Report gained wide recognition for its original and early exposure of the 1Malaysia Development Berhad scandal.