There are a total of 4 seasons in Attack on Titan; currently, the fourth season is ongoing! • Season 1 (2013): 25 Episodes • Season 2 (2017): 12 Episodes • Season 3, Part 1 (2018): 12 Episodes • Season 3, Part 2 (2019): 10 Episodes • Season 4 (2020): Ongoing • OVAs (2014-2018): 8 Episodes