Ulysses F. Olsen High is a school in the Roswell High series. It is the high school where the main characters all attend.
- Liz Ortecho, a senior
- Max Evans, a senior
- Maria DeLuca, a junior
- Alex Manes, a senior
- Isabel Evans, a junior
- Michael Guerin, a senior
- Arlene Bluth, a senior and Liz's rival for valedictorian
- Jerry Cifarelli, he and Liz date for a while
- Maggie McMahon, she's in a relationship with Rick
- Rick Surmacz, he's also in a relationship with Maggie
- Kyle Valenti, son of Sheriff Valenti
- Lucinda Baker, she keeps a website that "ranks the kissing technique of every guy in school"
- Tish Okabe, Isabel's friend
- Stacey Scheinin, head cheerleader and rivals with Isabel
- Corrine Williams, she's throws a party
- John Andrews
- Nikolas Branson, he and Isabel date for a while
- Craig Cachopo
- Doug Highsinger, he dances with Stacey at a party
- Richard Jamison
- Rick Montes
- Tim Watanabe
- Mr. Beck, history teacher; Liz is in her class
- Ms. Hardy, biology teacher; Max and Liz are lab partners in her class
- Ms. Markham, English teacher; Isobel, Maria, and Arlene are in her class
- Ms. Shaffer, school principal, her car ended up on the roof of the gym junior year because of Isabel
- Guffman High is a rival school.
- The cheerleader uniforms are green and black.
- In the German book translations, Ms. Shaffer is split into two characters: Ms. Shaffer and Mr. Shaffer.
Community content is available under CC-BY-SA unless otherwise noted.