Mandjelia macgregori is a species of mygalomorph spider in the Barychelidae family.

It was described in 1994 by Australian arachnologists Robert Raven and Tracey Churchill.

The specific epithet macgregori honours Sir William MacGregor (1846–1919), a former Governor of Queensland.

[1][2] The species occurs in North Queensland on cracking black soil plains with basalt ridges.

The type locality is Bluff Downs Station, 60 km north-west of Charters Towers, on the Cape York Peninsula.