Achim Sidorov (born 24 August 1936) is a Romanian sprint canoer who competed in the late 1950s and early 1960s. He won two medals at the ICF Canoe Sprint World Championships with a gold (C-2 1000 m: 1963) and a silver (C-2 10000 m: 1958.
Sidorov also finished fifth in the C-2 1000 m event at the 1964 Summer Olympics in Tokyo.