- Pre-Crisis Supergirl Chronology: Interactive timeline for classic Supergirl comicbooks.
- Supergirl, Superwoman & Power Girl Historical Timeline Part 1: 1938-1986: The Mary Sue’s history of Supergirl, part one, written by Alan Kistler.
- Supergirl, Superwoman & Power Girl Historical Timeline Part 2: 1988 – 2015: The Mary Sue’s history of Supergirl, part two, written by Alan Kistler.
- Kara Zor-El (Earth-One): DC Wikia for Supergirl.
- Supergirl: The Maiden of Might: Reviews of many pre-Crisis Supergirl comicbooks.
Supergirl fan sites
- Supergirl: Maid of Might Supergirl in print, on tv, at the movies, plus assorted information.
- Supergirl Comic Box Commentary: Supergirl fan blog, including news and reviews.
- Supergirl.TV Free site, dedicated to the Melissa Benoist tv show.
- Supergirl Radio: Teresa Jusino and Rebecca Johnson discuss each episode of the Melissa Benoist tv show, and Supergirl in general.
- Supergirl TV Talk: Podcast for the Melissa Benoist Supergirl tv show, linked to the supergirl.tv site.