Trudi Thomson (née Green, born 18 January 1959) is a British former distance runner and ultramarathon runner who competed for Great Britain at the IAU 100 km World Championships in 1993 and 1994, the IAAF 1995 World Cup Marathon, the IAAF 1995 World Championships Marathon and the IAAF 1995 World Championships Half Marathon. She represented Scotland at the 1999 World Mountain Running Trophy. She finished second at IAU 100 km World Championships in 1994, setting a British record (7:42:17).