Xysticus simonstownensis is a species of spider in the family Thomisidae. It is endemic to the Western Cape province of South Africa.
Xysticus simonstownensis is endemic to the Western Cape province of South Africa. The species is known only from the type locality at Simon's Town, where it occurs at 125 m above sea level.
Xysticus simonstownensis are free-living ground dwellers.
Xysticus simonstownensis is listed as Data Deficient for taxonomic reasons. The species was described from a juvenile specimen, and the status remains obscure. More sampling is needed to collect female and male adults and to determine the species' range.
The species was originally described by Embrik Strand in 1909 from Simon's Town. African species of Xysticus have not been revised. The species is known only from a juvenile specimen without illustrations, and more sampling is needed to collect adult material.