The cotton fleahopper, Pseudatomocelis seriatus (Reuter), is a major pest of cotton, Gossypium hirsutum L., in Texas and Oklahoma. Although commonly studied as a cotton pest, little is known of the insect parasitoids attacking cotton fleahopper nymphs and adults. We surveyed parasitoids of cotton fleahopper collected during 2 years from wild plant hosts in 17 Texas counties from the Rio Grande Valley to northcentral Texas. The only parasitoid found was Leiophron uniformis (Gahan) (Braconidae). Parasitoids were recovered from 2–4% of nymphs and 0–1% of adults as determined by dissection or by holding cotton fleahoppers for parasitoid emergence. The parasitoid was reared from cotton fleahopper collected from Monarda spp., Solanum elaeagnifolium A. Cavanilles, and Croton glandulosus L., but was not recovered from cotton fleahopper collected on Croton capitatus A. Michaux or Tidestromia lanuginosa (Nutt.) Standl. The low parasitism rate suggested that importation and establishment of parasitoids might be beneficial if increased parasitism resulted in fewer cotton fleahopper adults dispersing from wild hosts into cotton.