Gunnar Klettenberg (born 27 October 1967) is an Estonian equestrian.[1]
He was born in Viljandi. In 1992 he graduated from Estonian Agricultural University in veterinary science.[1]
He began his riding career in 1978. His coaches have been Jaanis Roos, Andrus Mäerand, Aadi Pärtel and Zigmantas Šarka. Since 1998 he is a member of Estonian national riding team. He has competed at 2011 FEI World Cup Finals. He is multiple-times Estonian champion. He is the first Estonian who surpassed 2 m in equestrian high jump (Estonian: ratsutamise kõrgushüpe) (2000).[1]
In 1997–1999, 2001, 2005, 2008, 2011–2012 and 2015 he was named as Best Show Jumper of Estonia.[1]