Jonas Ems (born 26 August 1986) is a German sprint canoer who has competed since the mid-2000s. He has won four medals at the ICF Canoe Sprint World Championships with a gold (K-1 200 m: 2007), two silvers (K-1 4 × 200 m: 2009, K-4 200 m: 2005) and a bronze (K-2 200 m: 2013).