Mark Carwardine (IPA: /kɑː'wɔːdiːn/ car-WOR-dean; born 9 March 1959) is a British conservationist who achieved widespread recognition with his 20-year conservation project – Last Chance to See – which involved round-the-world expeditions with Douglas Adams and Stephen Fry.

This is a sequel to the best-selling book, Last Chance to See, which he wrote with the late Douglas Adams (author of The Hitchhiker's Guide to the Galaxy).

In 1989 the BBC Radio 4 series Last Chance to See and the subsequent book (1990) described eight expeditions by Carwardine and writer Douglas Adams to find and report on some of the most endangered species around the world.

These were the aye-aye in Madagascar, the Komodo dragon in Indonesia, the kākāpō in New Zealand, the Amazonian manatee in Brazil, the Yangtze river dolphin in China, the Juan Fernández fur seal in Chile, the northern white rhino in the Democratic Republic of the Congo, and the Rodrigues fruit bat in Mauritius.

In autumn 2009, he joined forces with Stephen Fry to present a follow-up to the original Last Chance to See with the late Douglas Adams.

In 2009, Carwardine and television presenter Stephen Fry visited Codfish Island in New Zealand as part of a series for the Last Chance to See, focusing on endangered species around the world.