Sofia or Sophia is a female given name meaning "wisdom" in Greek. Sofie and Sophie are variants used in some languages such as French and German. Sonia is an offshoot.

In Harry Turtledove's work, Sofia may refer to:

Characters known only as Sofia:

Sofia (The Gladiator), a minor character who is a classmate of Gianfranco Mazzilli in the novel The Gladiator.
Sofia (The War That Came Early), a barmaid in The War That Came Early.
Sophia (Farmers' Law), resident of Abrostola in "Farmers' Law".

Characters named Sophie:

Sophie, Duchess of Hohenberg, historic Austro-Hungarian aristocrat whose murder in 1914 is alluded to in numerous works.
Sophie Hamburger, member of a fictional Brooklyn family featuring prominently in Southern Victory.
Sophie Lundgren, fictional schoolteacher, minor character in Supervolcano: Things Fall Apart.

Characters named Zofia:

Zofia Klopotowski, minor fictional character in Worldwar.

Characters named Sonia:

Sonia Phillips, fictional character in "The Fillmore Shoggoth".

Places and things named Sofia:

Sophia (moon), fictional moon in A World of Difference.