In Greek mythology, Perse (also Persa or Perseis) was a daughter of Oceanus and Tethys, therefore one of the three-thousand Oceanids. According to varying versions, she married either Helios or Apollo and had several children: Aegea, Aeetes, Calypso, Circe and Pasiphae.

Due to unfortunate coincidence, 'perse' is an obscene word in Finnish, which has given Finnish children studying Greek mythology many a guffaw.

Perse (Pērse) is a river and a waterfall in Koknese manor park, Aizkraukles county , Latvia. Part of Perse river, including the waterfall section, was flooded in 1967 by hydroelectric dam of Plavinas power plant (Pļaviņu HPP). A granite sculpture by Juris Zihmanis now marks the location of the waterfall. Manor buildings were destroyed during World War I.

The Perse School is an independent school in Cambridge, England. See Perse School.