Tetragnatha nigricans is a species of Tetragnathidae spider that is endemic to New Zealand.

[1] This species was described in 1917 by Raymond Comte de Dalmas from a female specimen collected in Whanganui.

[1] This species is only known from Whanganui, New Zealand.

[1] 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".

This Tetragnathidae-related article is a stub.