Summer Girl may refer to:

• Summer Girl, album by American band Smash Mouth
• "Summer Girl" (song), by Canadian band Stereos
• "Summer Girl", song by American group Jamiroquai
• "Summer Girls", song by English band LFO
• "Summer Girls", song from the album Kescke Bak by Ralph McTell

• MX-7 Gagamba
• MX-8 Armored Escort Vehicle
• Mx9s
• MXA
• Mxat
• MX (band)
• MxBx
• MxBx 1998/13,000 Miles at Light Velocity
• MxBx 1998/13,000 Miles At Light Velocity
• MX designations
• MXDN
• MXenergy
• M.xenopi
• MX entry
• MXF
• MXIM
• Mxit
• MXit Lifestyle
• MXL
• MXM
• MXM Graphics Module
• MXM PCI
• MXM PCI Express
• MX Newspaper
• MXP