Wiltonia graminicola is a species of Orsolobidae that is endemic to New Zealand.

[1] This species was described in 1985 by Ray Forster and Norman Platnick from male and female specimens collected in Dunedin.

The holotype is stored in Otago Museum.

It is apparently restricted to tussock grasslands.

[1] Under the New Zealand Threat Classification System, this species is listed as "Naturally Uncommon" with the qualifier "Range Restricted".