Johnny Mathis (born 1935) is an American pop music singer.
John or Johnny Mathis may refer to:
- "Country" Johnny Mathis (1930–2011), American country music singer and songwriter
- John Mathis, American politician from Utah
- John Mathis (1942–2023), American soul singer who performed as Johnny Johnson for Johnny Johnson and the Bandwagon
- Johnny Mathis (basketball) (1943–2023), American basketball player