Lozan Vladimirov Kotsev (; 8 February 1911 - 14 June 1991) was a Bulgarian footballer and a manager.
Kotsev started his playing career with Bulgarian side FK 13. After that, he signed for Lausanne-Sport in Switzerland, becoming the first Bulgarian to play abroad and helping them win the league title.
In 1960, Kotsev was appointed manager of Bulgarian club Cherno More. After that, he was appointed manager of Sudan. After that, he was appointed manager of Singapore. In 1972, he was appointed manager of Beroe in Bulgaria. In November 1974 he spent 1 and a half month in Greece as the manager of Egaleo.