Psamathe may refer to:
Greek mythology Psamathe (Nereid) Psamathe (Crotopus), Daughter of Crotopus
Other Psamathe (moon), moon of Neptune Psamathe (polychaete), polychaete worm genus Psamathe (Leighton), 1880 painting of the Nereid by Frederic Leighton