Mahura bainhamensis is a species of Agelenidae that is endemic to New Zealand.
This species was described in 1973 by Ray Forster and Cecil Wilton from a male specimen. The holotype is stored in Otago Museum.
The male is recorded at 2.50mm in length. The cephalothorax and legs are pale cream. The abdomen is coloured black dorsally with pale markings.
This species is only known from near Bainham in the Tasman District, New Zealand.
Under the New Zealand Threat Classification System, this species is listed as "Data Deficient" with the qualifiers of "Data Poor: Size" and "Data Poor: Trend".