Lana Lang is a fictional supporting character in DC Comics' Superman series. Created by writer Bill Finger and artist John Sikela, the character first appears in Superboy #10 (September/October 1950). Across decades of Superman comics and adaptations into other media, Lana has most consistently been depicted as Superman's teenage romantic interest growing up in Smallville; as an adult, she is a distant friend of Superman in his civilian identity as Clark Kent.

Lana is one of many Superman characters with the alliterative initials "LL", the most notable other examples being Superman's principal love interest Lois Lane and nemesis, Lex Luthor. In the Silver Age, she regularly appeared in comic books depicting the adventures of Superman's teenaged self, Superboy, and also appeared as an adult in numerous Superman titles, vying with Lois Lane for his attention. In modern revisions to DC Comics continuity, she and Clark are shown to have remained close friends since their teenage years. The precise story varies across differing revisions of Superman's origin story. For example, in Superman: Secret Origin, Lana becomes privy to Clark's unusual abilities at an early age and becomes his earliest confidant outside of his parents and the futuristic Legion of Super-Heroes.

Lana Lang is a fictional character on the television series Smallville. She has been a series regular since the pilot episode, and has been played continuously by Kristin Kreuk, with two other actresses having portrayed Lana Lang as a child and as an elderly woman. The character of Lana Lang, first created for comic books by Bill Finger and John Sikela in the 1950s as a romantic interest for Superboy, was adapted to television in 2001 by Alfred Gough and Miles Millar. The character has also appeared in various literature based on the Smallville television series, none of which directly continues from or into the television episodes.

In Smallville, Lana is the love interest for Clark Kent, though, in the first season she is dating Whitney Fordman. By season two, with Whitney's departure, Lana and Clark begin to grow closer. Clark's dishonesty over the secrets he is hiding causes their relationship to end. Lana then grew closer to Lex Luthor. Eventually, Lana learns the truth about Clark and they get back together. After stealing a kryptonite-powered suit from Lex, Lana absorbs an enormous amount of kryptonite radiation, which prohibits her from getting too close to Clark, and she leaves Smallville for good, but vowed to continue to use her powers to preserve life.