Udo Poser (born 21 August 1947) is a German former swimmer.

He competed at the 1968 and 1972 Summer Olympics and won a bronze medal in the 4 × 100 m freestyle relay in 1972 by swimming for the East Germany team in the preliminary round.

[1] He competed at two European championships in 1966 and 1970 and earned eight medals, including three gold medals, and set one world record in the 4 × 100 m freestyle relay in 1970.

[2] Between 1969 and 1971 he won six national titles in the 100 m and 200 m butterfly events.

This biographical article related to a German swimmer is a stub.