Costică Olaru (born August 1, 1960) is a Romanian sprint canoer who competed in the early 1980s. He won a bronze medal in the C-1 500 m event at the 1984 Summer Olympics in Los Angeles.
Olaru won two medals at the 1983 ICF Canoe Sprint World Championships with a gold in the C-1 500 m and silver in the C-1 1000 m events.