Here is the chronological order to watch the Japanese anime television series and movies One Piece:
East Blue Saga (episodes 1-61)
Romance Dawn Arc(episodes 1-3)
Orange Town Arc (episodes 4-8)
Syrup Village Arc (episodes 9-18)
Movie #1 | One Piece: the movie (After episode 18)
Baratie Arc (episodes 19-30)
Arlong Park Arc (episodes 31-44)
Loguetown Arc (Episodes 45, 48-53)
Buggy's Crew Adventure Chronicles (episodes 46-47)
Movie #2 | Clockwork Island Adventure (After episode 52)
Warship Island arc (Filler arc) (episodes 54-61)
Arabasta Saga (episodes 62-135)
Reverse Mountain Arc (episodes 62-63)
Whiskey Peak Arc (episodes 64-67)
Diary of Koby-Meppo Arc (episodes 68-69)
Little Garden Arc (episodes 70-77)
Drum Island Arc (episodes 78-91)
Movie #9 | Episode of Chopper Plus: Bloom in Winter, Miracle Sakura (Drum Island Arc remake)
Arabasta Arc (episodes 92-130)
Movie #3 | Chopper's Kingdom on the Island of Strange Animals (After episode 102)
Movie #4 | Dead End Adventure (After episode 130)
Post-Arabasta Arc (Filler arc) (episodes 131-135)
Movie #8 | Episode of Arabasta: The Desert Princess and the Pirates (Arabasta saga remake)
Sky Island Saga (episodes 136-206)
Goat Island Arc (Filler arc) (episodes 136-138)
Ruluka Island Arc (Filler arc) (episodes 139-143)
Movie #5 | The Cursed Holy Sword (After episode 143)
Jaya Arc (episodes 144-152)
Skypiea Arc(episodes 153-195)
G-8 Arc (Filler arc) (episodes 196-206)
Water 7 Saga (episodes 207-325)
Long Ring Long Land Arc (episodes 207-219)
Ocean's Dreams Arc (Filler arc) (episodes 220-224)
Foxy’s Return Arc (Filler arc) (episodes 225-228)
Movie #6 | Baron Omatsuri and the Secret Island (After episode 224)
Admiral Aokiji Arc (episodes 227-228)
Movie #7 | The Giant Mechanical Soldier of Karakuri Castle (After episode 228)
Water 7 Arc (episodes 229-263)
Enies Lobby Arc (episodes 264-290, 293-302, 304-312)
Boss Luffy Historical Special (Special Episodes) (Episodes 291-292, 303, 406-407)
Post-Enies Lobby Arc (episodes 313-325)
Thriller Bark Saga (episodes 326-384)
Ice Hunter Arc (Filler arc) (episodes 326-335)
Chopper Man Special (Special Episodes) (episode 336)
Thriller Bark Arc (episodes 337-381)
Movie #10 | One Piece Film: Strong World (After episode 381)
Spa Island Arc (Filler arc) (episodes 382-384)
Summit War Saga (episodes 385-516)
Saboady Archipelago Arc (episodes 385-405)
Movie #11 | One Piece 3D: Straw Hat Chase
Amazon Lily Arc (episodes 408-417)
Straw Hat's Separation Serial (418-421, 453-456)
Impel Down Arc (episodes 422-425, 430-452)
Little East Blue Arc (Filler arc) (episodes 426 - 429)
Marineford Arc (episodes 457-489)
Post-War Arc (episodes 490-491, 493-516)
Toriko Crossover (Special Episode) (Episode 492)
Time Skip to The Final Sea: The New World Saga
How to watch One Piece in order? All episodes and movies
Fish-Man Island Saga (episodes 517-574)
Return to Sabaody Arc (episodes 517-522)
Movie #12 | One Piece Film: Z (After episode 573)
Fish-Man Island Arc (episodes 523-541, 543-574)
Toriko Crossover (Special Episode) (Episode 542)
Dressrosa Saga (episodes 575-746)
Z's Ambition (Filler arc) (episodes 575-578)
Punk Hazard Arc (episodes 579-589, 591-625)
Toriko & Dragon Ball Crossover (Special Episode) (Episode 590)
Caesar Retrieval (Filler arc) (episodes 626-628)
Dressrosa Arc(episodes 629-746)
Four Emperors Saga (episodes 747- Ongoing)
Silver Mine Arc (Filler arc) (episodes 747-750)
Movie #13 | One Piece Film: Gold (After episode 750)
Zou Arc (episodes 751-779)
Marine Rookie Arc (Filler arc) (episodes 780-782)
Whole Cake Island Arc (episodes 783-877)
Movie #14 | One Piece Stampede (After Whole Cake Island Arc)
Levely Arc (episodes 878-889)
Wano Arc (episodes 890-894)
Cidre Guild Arc (Filler arc) (Episodes 895-896)
Wano Arc Part 2 (episodes 897-1028)
Anime 20th Anniversary Special (Special Episode) (Episode 907)
Uta's Past Arc (Filler arc) (Episodes 1029-1030)
Movie #15 | One Piece RED (after Uta's Past Arc)
Wano Arc Part 3 (episodes 1031-ongoing)
