Kosmos 24 (Russian: Космос 24 meaning Cosmos 24) or Zenit-2 No.15 was a Soviet optical film-return reconnaissance satellite which was launched in 1963. A Zenit-2 satellite, Kosmos 24 was the fifteenth of eighty-one such spacecraft to be launched and had a mass of 4,730 kilograms (10,430 lb).
Kosmos 24 was operated in a low Earth orbit. On 23 December 1963 it had a perigee of 199 kilometres (124 mi), an apogee of 392 kilometres (244 mi), with inclination of 65 degrees and an orbital period of 90.43 minutes. Having spent nine days in orbit, the spacecraft was deorbited on 28 December 1963. Its return capsule descended under parachute for recovery by Soviet forces.
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in brackets.