Reinga aucklandensis is a species of spider in the family Desidae that is endemic to New Zealand.
This species was described as Syrorisa aucklandensis by Brian John Marples in 1959 from a female specimen. It was most recently revised in 1973. The holotype is stored in Otago Museum.
The female is recorded at 6.62mm in length. The carapace is coloured yellow with a grey marking dorsally. The legs are yellow and with grey bands. The abdomen is grey with white markings dorsally.
This species is only known from Auckland, New Zealand.
Under the New Zealand Threat Classification System, this species is listed as "Data Deficient" with the qualifiers of "Data Poor: Size", "Data Poor: Trend" and "One Location".