Christian August Christensen (August 6, 1876 – December 5, 1956) was a Danish track and field athlete who competed at the 1900 Summer Olympics in Paris, France. He was a member of Københavns Idræts Forening and served as the club's president from 1903-1905 and from 1916-1918. He took fifth place in the single-round final of the 1500 metres. His time is unknown. Christensen also competed in the 800 metres. He placed fifth in his first-round (semifinals) heat and did not advance to the final.