The Least Pauraque or Least Poorwill (Siphonorhis brewsteri) is a species of nightjar in the Caprimulgidae family. It is found in the Dominican Republic and Haiti.

Its natural habitat is subtropical or tropical dry forests. As seen by the fact that it was only described in 1917, this is an enigmatic and little-known bird. It was listed as Near Threatened by the IUCN from 1988 on, but in 2000 its status was changed to Data Deficient, owing to the continuing uncertainty. With more information available, it is again listed as Near Threatened in the 2007 IUCN Red List.