Orthosia pacifica is a species of cutworm or dart moth in the family Noctuidae. It is found in western North America.
Adults are gray-brown. The fore-wings are light brown with darker brown and black markings. The hind-wings are whitish with darker markings. Larvae are green with white dorsal lines and markings.
The MONA or Hodges number for Orthosia pacifica is 10494.