Charlie Barnes (and variants) may refer to:

• Charlie Barnes (musician), English singer-songwriter
• Charlie Barnes (Australian footballer) (1903–1981), Australian rules footballer
• Charley Barnes (born 1938), American football player
• Charles Barnes (1901–1998), Australian politician
• Charles Barnes (cricketer) (1882-1947), Australian cricketer
• Charles Reid Barnes (1858–1910), American botanist

• Battle of Slivnitza
• Battle of Sluis (1603)
• Battle of Sluys (1603)
• Battle of Smilow
• Battle of Smithfield Crossing
• Battle of Smolensk (1943)
• Battle of Smoliani
• Battle of Snoul
• Battle of Snuol
• Battle of Snyder's Bluff
• Battle of Sobota
• Battle of Sobraon
• Battle of Soissons (1918)
• Battle of Soissons (718)
• Battle of Soissons (923)
• Battle of Solachon
• Battle of Solicinium
• Battle of Soloi
• Battle of Soloman Islands
• Battle of Solomon
• Battle of Solomons
• Battle of Solstizio
• Battle of Solun
• Battle of solway moss
• Battle of Soncino