Euphemia was a virgin martyr, who died for her faith at Chalcedon in 303 AD.
Euphemia, also rendered as Eufemia and Eupham, may also refer to:
People Euphemia (empress) Euphemia (given name) Euphémie (given name) Surname Catarina Eufémia (1928–1954), Portuguese peasant who became a symbol of Portuguese communists Frank Eufemia (born 1959), retired Major League Baseball relief pitcher
Fictional characters Effie Munro, in the Sherlock Holmes story "The Adventure of the Yellow Face" Effie Perine, detective Sam Spade's secretary in The Maltese Falcon Euphemia, in the 2022 film adaption of Death on the Nile Euphemia li Britannia, in the anime series Code Geass
Other uses , a United States Navy patrol boat in commission from 1917 to 1919 630 Euphemia, a minor planet Euphemia (typeface), included in OS X "Euphemia", song by Area 11 from the albums Blackline and All the Lights in the Sky Gulf of Saint Euphemia, an Italian gulf
See also Santa Eufemia (disambiguation) for a list of geographic locations named after Euphemia