°L may refer to:

• °Lintner, a scale for measuring enzymatic activity
• °Lovibond, a scale for measuring transparency

• Solnik Point
• Solnkletten
• Solno
• Solnok
• Solnova
• Solnova 1
• Solnova solar power plant
• Solnova Solar Power Station
• Solno, Warmian-Masurian Voivodeship
• Solnowek
• Solno, West Pomeranian Voivodeship
• Solntse (album)
• Solntsevo Brotherhood
• Solntsevskaya bratva
• Solntsevskaya Light Metro Line
• Solntsevskaya Line
• Solnówek
• SOLO
• Solo 210
• Solo (a cappella group)
• Solo Acoustic, Vol. 2
• Solo act
• Solo-act
• Solo (album)
• Solo (Alsou song)