502 may refer to:

• 502 (number), a number
• AD 502, a year
• 502 BC, a year
• Area code 502, a North American telephone area code in northern central Kentucky, including Louisville
• List of highways numbered 502
• "502" (song), by Megadeth
• "502", a song by Marduk on the album Panzer Division Marduk about the 502nd Heavy Panzer Battalion.
• HTTP 502, the HTTP error response status for "Bad Gateway"
• Fiat 502, a passenger car

• 502nd (disambiguation)