Eugenia is a feminine first name related to the masculine name Eugene that comes from the Greek eugenes 'well-born', from eu- 'well' + genes 'born' (from genos).^[1]

Variants include Eugénia (Portuguese), Eugénie (French), Eugènia (Catalan), Uxía (Galician), Evgenia (Greek: Ευγενία), Eugenija (Lithuanian) and Yevgenia or Yevgeniya (Russian: Евгения; also transliterated as Evgenia or Evgeniya) as well as Yevheniia in Ukraine.

• Eugenia of Rome (died c. 258), Roman Christian martyr
• Eugenia Smet (1825–1871), French nun, founder of the Society of the Helpers of the Holy Souls
• Princess Eugenia Maximilianovna of Leuchtenberg (1845–1925)
• Eugenia Abu, Nigerian journalist
• Eugenia Bonetti, Italian nun
• Princess Eugenia de Jesús de Borbón y Vargas (born 2007), French-Spanish aristocrat
• Eugenia Bujak, Lithuanian-Polish cyclist
• Eugenia Calle (1952–2009), American cancer epidemiologist
• Eugênia Câmara (1837–1879), Portuguese actress
• Eugenia Caruso, Italian actress and screenwriter
• Eugenia Cauduro (born 1968), Mexican actress
• Eugenia Shi-Chia Chang, South African Member of Parliament
• Eugenia Charles (1919–2005), Prime Minister of Dominica
• Eugenia Cheng, British mathematician, educator, and concert pianist
• Eugenia Chuprina (born 1971), Ukrainian poet, writer, and playwright
• Eugenia Clinchard (1909–1989), American child actress
• Eugenia Cooney (born 1994), American internet personality
• Eugenia Errázuriz (1860–1951), Chilean patroness of the arts
• Eugenia Falleni (1875–1939), Italian-Australian transgender man convicted of murder
• Eugenia Gabrieluk (born 1967), Russian pianist
• Eugenia Williamson Hume (1865–1899), American elocutionist and educator
• Eugenia Kisimova (1831–1885), Bulgarian women's rights activist
• Eugenia Kuzmina (born 1987), Russian-American model and actress
• Eugenia Mandzhieva (born 1985), Russian fashion model and actress of Kalmyk descent
• Eugenia St. John Mann (1847-1932), American evangelist and temperance lecturer
• Eugenia Manolidou (born 1975), Greek composer and conductor
• Eugenia Malinnikova (born 1974), Russian mathematician
• Eugenia L. Mobley (1922–2011), American dentist, college dean
• Eugenia de Montijo (1826–1920), wife of Napoleon III of France
• Eugenia Nobel (1912–1999), German writer
• Eugenia Campbell Nowlin (1908–2003), American arts administrator, artist
• Eugenia Paul (1935–2010), American actress and dancer
• Eugenia del Pino (born 1945), Ecuadorian developmental biologist
• Eugenia Popa (born 1973), Romanian gymnast
• Eugenia Popescu-Județ (1925–2011), Romanian dancer
• Eugenia Price (1916–1996), American author
• Eugenia Rasponi (1873–1958), Italian noblewoman, suffragist, and businesswoman
• Eugenia Ravasio (1907–1990), Italian Catholic nun and mystic
• Eugenia Silva (born 1976), Spanish model
• Eugenia Smith (1899–1997), claimed to be Grand Duchess Anastasia Nikolaevna of Russia
• Eugenia D. Soru (1901–1988), Romanian chemist
• Eugenia Tsoumani-Spentza (died 2020), Greek politician
• Eugenia Tymoshenko (born 1980), Ukrainian entrepreneur and activist
• Eugenia Volodina (born 1984), Russian supermodel
• Eugenia Washington (1838–1900), American Catholic historian, civil servant, and one of the founders of Daughters of the American Revolution
• Eugenia Yuan (born 1976), American gymnast and actress
• Eugenia Zukerman (born 1944), American flautist

• Eugenia "Skeeter" Phelan, a protagonist in The Help
• Eugenia Randolph Lord, a character in One Life to Live
• Eugenia Dermody, a character in season 1 of Ozark
• Eugenia, a minor character in season 1 and 2 of Snowpiercer