Meder is a surname. Notable people with the surname include:
- Reinhold Meder (*1966), German musician
- Jamie Meder (born 1991), American football player
- Johann Valentin Meder (1649–1719), German composer
Meder/Medr may also refer to the Ethiopian, Aksumite, earth god.
Medr may also refer to Medr (Wales), a Welsh education body.