Shimon Ratner (Hebrew: שמעון רוטנר; 26 July 1898 – 21 January 1964), also known as Shimon Leumi (Hebrew: שמעון לאומי) and by the nickname "Lumek" (Hebrew: לומק), was a Polish-born football player and coach, who coached the Mandatory Palestine national team in 1934,^[1] taking control of them for their first ever match during the 1934 FIFA World Cup qualification campaign.^[2]

Ratner was born in Kraków, Poland, to a Jewish family. He emigrated to Vienna in 1914, where he joined Hakoah Vienna.^[3] In 1920 Ratner emigrated to Mandatory Palestine, where he joined Maccabi Tel Aviv, later also acting as the club's manager. In 1928 Ratner moved to Maccabi Avshalom Petah Tikva,^[4] and later to Hapoel Petah Tikva, where he stayed, in several functions, including as club manager, until 1954.^[3] In 1934, Ratner was appointed as manager of the Mandatory Palestine national team for its campaign in the 1934 FIFA World Cup qualification.^[5] After the campaign, which lasted two matches, Ratner stepped down. Ratner, who hebraized his last name to Leumi, died on 21 January 1964.^[3][6]