Geoffrey De Mulder (1930 – 11 December 2009) was an English greyhound trainer.

[1] He was born in Yorkshire and grew up in a greyhound racing environment because his father Joe De Mulder was a prominent trainer during the 1950s and 1960s.

[2] After learning his trade with his father he took over the National Greyhound Racing Club licence in 1967 and he made the Gold Collar final in his rookie year.

[3] His first major result was getting Little County into the 1970 English Greyhound Derby final where he finished runner-up.

His protégé Tony Meek[8] went on to win two English Greyhound Derby finals.