Andrew "Tridge" Tridgell OAM (born 28 February 1967) is an Australian computer programmer. He is the author of and a contributor to the Samba file server, and co-inventor of the rsync algorithm. His submitted dissertation 'Efficient Algorithms for Sorting and Synchronization' was based on his work on the rsync algorithm.

On 26 January 2020, Tridgell was awarded the Medal (OAM) of the Order of Australia in the General Division for service to Information Technology. The biographical notes for the award noted his contributions to software development and education including his work on rsync, Samba, ArduPilot, MAVProxy as well as teaching at the Australian National University