Where to continue the Demon Slayer manga

Demon Slayer by Koyoharu Gotouge, 2016. The manga is complete at 205 chapters across 23 volumes.

• Season 1 (26 episodes): Continue the manga from chapter 54 in volume 7. The finale only adapts the first few pages of 54, so read it from the start.
• Season 2: Mugen Train (7 episodes): Continue the manga from chapter 67 in volume 8.
• Season 2: Entertainment District (11 episodes): Continue the manga from chapter 98 in volume 12.
• Season 3: Swordsmith Village (11 episodes): Continue the manga from chapter 128 in volume 15.
• Season 4: Hashira Training (8 episodes): Continue the manga from chapter 140 in volume 16.
• The Movie: Infinity Castle Part 1: Continue the manga from chapter 157 in volume 18. The film ends partway into chapter 157, so start there again to catch the second half you haven't seen yet.