* = not yet released
Titles in purple feature MCs of color

Gay

• Felix Yz by Lisa Bunker
• Better Nate Than Ever and Five, Six, Seven, Nate! by Tim Federle
• Totally Joe by James Howe
• Marco Impossible by Hannah Moskowitz
• So Hard to Say by Alex Sanchez

Lesbian

• *Hurricane Child by Kheryn Callender
• *One True Way by Shannon Hitchcock
• Starring Kitty by Keris Stainton
• *P.S. I Miss You by Jen Petro-Roy

Bisexual

• *Ivy Aberdeen’s Letter to the World by Ashley Herring Blake
• *Star Crossed by Barbara Dee
• The Trials of Apollo series by Rick Riordan

Transgender Girls

• *Zenobia July by Lisa Bunker
• Lily and Dunkin by Donna Gephart
• George by Alex Gino
• Gracefully Grayson by Ami Polonsky

Transgender Boys

• The Other Boy by M.G. Hennessey

Non-Binary

At present I know of no non-binary main characters in MG, but there is representation in the The Trials of Apollo series by Rick Riordan.