Leigh Stefan Lanham (born 15 August 1977 in Ipswich, Suffolk) is a speedway rider in the United Kingdom.
Son of former rider Mike, Lanham won the British Under 21 Championship in 1997. He has reached the World Under 21 Final and has finished in the top six of the British Speedway Championship.
In December 2011 he signed to ride for Coventry Bees in the Elite League as a double-up rider, sharing a team place with Aaron Summers. Following the closure of the Premier League Newport Wasps team, Lanham rode for the Rye House Rockets for a short period, before re-joining his home town club Ipswich Witches, following an injury to Morten Risager. He now rides for the Rye House Rockets.