TVMaze Order (Original Air Date)
20 Groups, 366 Episodes
All episodes in the TVMaze order. See the full list here: https://www.tvmaze.com/shows/215/american-dad/episodes
Wikipedia Order (Original Air Date)
19 Groups, 344 Episodes
All episodes in wikipedia order. The full list can be found here: https://en.wikipedia.org/wiki/List_of_American_Dad!_episodes
Wikia Order (Original Air Date)
17 Groups, 344 Episodes
The full list of episodes for the Wikia order can be viewed here: https://americandad.fandom.com/wiki/Episode_Guide_List
TVDB Order (Original Air Date)
19 Groups, 344 Episodes
A list of the TVDB order can be found here: https://thetvdb.com/series/american-dad/allseasons/official