Karl Ludwig

Karl or Carl Ludwig may refer to:

• Charles I Louis, Elector Palatine (1617–1680)
• Karl Ludwig, Prince of Hohenlohe-Langenburg (1762–1825)
• Archduke Karl Ludwig of Austria (1833–1896)
• Carl Ludwig (1816–1895), German physician and physiologist
• Carl Ludwig (Medal of Honor) (1841–1913), Union Army soldier and Medal of Honor recipient
• Karl Ludwig (footballer) (1886–1948), German footballer
• Archduke Carl Ludwig of Austria (1918–2007)
• Karl Ludwig (sledge hockey) (born 1988), Canadian ice sledge hockey player