Dahmer – Monster: The Jeffrey Dahmer Story is the first season of the American biographical crime drama anthology television series Monster, created by Ryan Murphy and Ian Brennan for Netflix, which was released on September 21, 2022. Murphy and Brennan both serve as showrunners. Dahmer is about the life of serial killer Jeffrey Dahmer (Evan Peters). Other main characters include Dahmer's father, Lionel (Richard Jenkins), his stepmother Shari (Molly Ringwald), suspicious neighbor Glenda (Niecy Nash), and grandmother Catherine (Michael Learned).

Dahmer received mixed reviews, but was ultimately a commercial success, reaching the number-one spot on Netflix in the first week of its release. The season became Netflix's second most-watched English-language series of all time within 28 days, and the third Netflix series to pass 1 billion hours viewed in 60 days. The series reached number one on the Nielsen Top 10 streaming chart in the first week of its release, and placed No. 7 on Nielsen's all-time list for single-week viewership in its second week.

The season received four nominations at the 80th Golden Globe Awards, including for the Best Limited or Anthology Series or Television Film, with Peters winning for Best Actor – Miniseries or Television Film. It received six nominations at the 75th Primetime Emmy Awards, including Outstanding Limited or Anthology Series and Outstanding Lead Actor in a Limited or Anthology Series or Movie for Peters. Ultimately, Nash won for Outstanding Supporting Actress in a Limited or Anthology Series or Movie.

The second season of the anthology, Monsters: The Lyle and Erik Menendez Story (2024), is based on the murder case of the Menendez brothers. The second season was released on September 19, 2024.