This is a list of adult animated feature films that were made from the 1950s onwards. These are films intended for a more mature audience than many animated feature films, all in theaters, direct-to-video and streaming.

All of the animated films must follow to be include in the list with these rules:

• Judging from their MPAA ratings, any PG-rated animated films with highly use of subject matters or adult themes before the introduction of PG-13 rating in 1984 is included. Before 1984, current PG-rated (or TV-PG below by the TV Parental Guidelines; if PG-13 film degraded with censorship as TV-PG per television premiere is included) animated films with similar themes (e.g. Corpse Bride and Shrek) is excluded.
• Television equivalents of MPA like TV-14 onwards must be included.
• Any animated films to be unrated by the MPA (e.g. Checkered Ninja and Chico and Rita) but with highly use of subject matters or adult themes must be included.
• Partial live-action films must have animation in no less than 65 percent of the running time.
  • Heavily use of photorealistic CGI and motion capture as visual effects (about 80-95 percent) in live-action or genre-driven films (e.g. James Cameron's Avatar franchise) is strictly excluded per violation guidelines of the animation medium.
• Short films, television series or web series are excluded.

• Animation in the United States in the television era
• LGBT representation in adult animation
• Modern animation in the United States
• Lists of animated feature films
• Independent animation
• Cartoon violence