Progress M-31 (Russian: Прогресс M-31) was a Russian unmanned Progress cargo spacecraft, which was launched in May 1996 to resupply the Mir space station.

Progress M-31 launched on 5 May 1996 from the Baikonur Cosmodrome in Kazakhstan.

[2][5] Progress M-31 docked with the forward port of the Mir Core Module on 7 May 1996 at 08:54:19 UTC, and was undocked on 1 August 1996 at 16:44:54 UTC.

[3][4] It remained in orbit until 1 August 1996, when it was deorbited.

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