30

30 may refer to:

• 30 (number), the natural number following 29 and preceding 31
• one of the years 30 BC, AD 30, 1930, 2030

Science

• Zinc, a transition metal in the periodic table
• 30 Urania, an asteroid in the asteroid belt

Music

• 30 (Harry Connick Jr. album), 2001
• 30 (album), by Adele, 2021
• 30 (Sungjin album), 2024
• ', 1998
• ', by Lynyrd Skynyrd, 2003
• 30, a 1997 album by Laurent Garnier
• 30, a 2004 album by James Yorkston
• 30, a 2006 album by Jerusalem, also called Tretti
• 30, a 2014 compilation album by Modern Talking
• 30, a 2016 album by Trio da Paz
• "Thirty", a 2019 album by Strings
• "Thirty", a song by Karma to Burn from the album Wild, Wonderful Purgatory, 1999
• "30", a 2011 song by Danny Brown from the album XXX
• "30", a 2021 song by Bo Burnham from the special '
• "30", a 2021 song by Pop Smoke from the album Faith