Op in order

Hope this helps with watching the show in order!

- One Piece episodes 1-8

- One Piece: Defeat him! The Pirate Ganzack! (OVA 1998) Note that this is OVA was produced before the original anime run of One Piece and therefore has a very different animation style and a completely different cast.

- One Piece episodes 9-18

- One Piece: The Movie (2000)

- One Piece episodes 19-44

- Episode of Nami: Tears of a Navigator and the Bonds of Friendship Movie (2012) Note that this is an abridged retelling of the Arlong Park Arc.

- One Piece episodes 45-53

- One Piece: Clockwork Island Adventure (2001) 

- One Piece: Adventure in the Ocean’s Navel TV Special (2000) 

- One Piece episodes 54-61 

- One Piece: Episode of East Blue: Luffy and his 4 Crewmate’s Big Adventure (2017)Note that this is an abridged recap of each of the five main characters’ story as they prepare to enter the Grand Line. It also includes hints at future adventures and crewmates in the closing credits. 

- One Piece Episodes 61-91 

- Episode of Chopper Plus: Bloom in the Winter, Miracle Cherry Blossom Movie (2008) Note that this is a remake of the Drum Island Arc, with different characters present and a condensed plot. 

- Dream Soccer King Short (2002) 

- One Piece episodes 92-130 One Piece: The Desert Princess and the Pirates: Adventures Alabasta (2007) 

- Chopper’s Kingdom on the Island of Strange Animals (2002) 

- One Piece episodes 131-138 

- One Piece: Dead End Adventure (2003) 

- One Piece: The Cursed Holy Sword (2004) 

- One Piece: Open Upon the Great Sea! A Father’s Huge, HUGE Dream TV Special (2003) 

- One Piece: Take Aim! The Pirate Baseball King TV Special (2004) 

- One Piece episodes 139-195 One Piece: Episode of Skypedia TV Special (2018) 

- One Piece episodes 196-206 

- Baron Omatsuri and the Secret Island Movie (2005) 

- One Piece episodes 207-219 Save! The Last Big Stage TV Special (2003) 

- One Piece episodes 220-228 

- Giant Mecha Soldier of Karakuri Castle Movie (2006)

-  One Piece episode 229-290 

- One Piece episode 293-302 

- One Piece episodes 304-312 

- Episode of Merry: Tale of One More Friend TV Special (2013) Note that this special is an abridged retelling of the Water 7 and Enies Lobby arcs from the anime. 

- One Piece episodes 291-292 

- One Piece episode 303 

- One Piece episodes 406-407 

- One Piece episodes 313-381 

- Romance Dawn Story Movie (2008) 

- Romance Dawn Story Moviepisodes 382-384 

- Romance Dawn Story Moviepisodes 426-429 

- Strong World Episode 0 OVA (2009) 

- One Piece: Strong World (2009) 

- One Piece 3D: Straw Hat Chase (2011) 

- One Piece 3D: Trap Coaster (2011) 

-One Piece episodes 385-405 

-One Piece episodes 408-425 

- One Piece episodes 430-516 

- One Piece 3D2Y TV Special (2014)

 - One Piece episodes 517-578 

- Glorious Island Specials Part 1 and 2 (2012) 

- One Piece Film: Z (2012) 

- Episode of Luffy: Adventure on Hand Island TV Special (2012) 

- Episode of Sabo: The Three Brothers’ Bond – A Miraculous Reunion and an Inherited Will TV Special (2015) Note that this is an abridged retelling of the Dressrosa Arc of the anime. 

- One Piece: Adventure of Nebulandia TV Special (2015) 

- One Piece episodes 579-750 

- One Piece Film: Heart of Gold TV Special (2016) 

- One Piece Film: Gold (2016) 

- One Piece episodes 751-896 

- One Piece: Stampede (2019) 

- One Piece episodes 897-1030 

- One Piece: Red (2022) -

One Piece episodes 1030 - current