Thomas Allier (born March 24, 1975 in Fontenay-aux-Roses, Hauts-de-Seine) is a French professional "Mid/Current School" Bicycle Motocross (BMX) racer whose prime competitive years were from 1993-2006.
Allier was a member of the French Olympic BMX Team participating in the debut of BMX racing at the 2008 Summer Olympics in Beijing, China.