Larissa is a Greek name taken from the ancient city of Larissa in Thessaly, whose name is usually explained as "citadel" or "fortress". It is widespread in Russia and Brazil and is also the name of a moon of Neptune. Larissa ranked number 486 in the United States in 2000, peaked at number 448 in 2004 and fell out of the top 1000 in the 2010s; in 2025 it ranks number 1646 with 126 girls.