GOLDEN AGE
Snow White and the Seven Dwarfs (1937)
Pinocchio (1940)
Fantasia (1940) - I had this on tape somewhere and I know I saw some but I don't think I've seen the whole thing.
Dumbo (1941)
Bambi (1942)

PACKAGE FILM/WARTIME ERA
Saludos Amigos (1942/1943)
The Three Caballeros (1944/1945)
Make Mine Music! (1946)
Fun and Fancy Free (1947)
Melody Time (1948)
The Adventures of Ichabod and Mr. Toad (1949)

SILVER AGE
Cinderella (1950)
Alice in Wonderland (1951)
Peter Pan (1953)
Lady and the Tramp (1955)
Sleeping Beauty (1959)
101 Dalmatians (1961)
The Sword in the Stone (1963)
The Jungle Book (1967)

BRONZE/DARK AGE/EARLY RENAISSANCE
The Aristocats (1970)
Robin Hood (1973)
The Many Adventures of Winnie the Pooh (1977) - I love Winnie the Pooh so I should have, but I don't have a specific memory of it so I'm not marking it. Same for most of the following Winnie the Pooh. They would all have been when I was really little.
The Rescuers (1977)
The Fox and the Hound (1981) - My All Time Favorite Movie of All Movies
The Black Cauldron (1985)
The Great Mouse Detective (1986) - I think I saw this but I don't remember much of it.
Oliver & Company (1988) - I remember seeing the first part but I think it was interrupted by child me going swimming, .

THE DISNEY RENAISSANCE
The Little Mermaid (1989)
The Rescuers Down Under (1990)
Beauty and the Beast (1991)
Aladdin (1992)
The Lion King (1994)
Pocahontas (1995)
The Hunchback of Notre Dame (1996)
Hercules (1997)
Mulan (1998)
Tarzan (1999)

EXPERIMENTAL ERA/POST-RENAISSANCE
Fantasia 2000 (1999/2000) - Or the one I thought was on tape could have been this one.
Dinosaur (2000) - I think I finished watching this one, but not totally sure.
The Emperor's New Groove (2000)
Atlantis: The Lost Empire (2001)
Lilo & Stitch (2002)
Treasure Planet (2002)
Brother Bear (2003)
Home on the Range (2004)
Chicken Little (2005)
Meet the Robinsons (2007)

MODERN DISNEY
Bolt (2008)
The Princess and the Frog (2009)
Tangled (2010)
Winnie the Pooh (2011) - Fun fact, my family and like one random couple with a baby were the only ones in the theatre watching this one when I went.
Wreck-It Ralph (2012)
Frozen (2013)
Big Hero 6 (2014)
Zootopia (2016)
Moana (2016)
Ralph Breaks the Internet (2018)
Frozen II (2019)
Raya and the Last Dragon (2021)
Encanto (2021)

DISNEY TV ANIMATION & DISNEYTOONS (Sequels, TV movies, etc)
DuckTales the Movie: Treasure of the Lost Lamp (1990)
The Return of Jafar (1994) - Maybe, but not sure.
A Goofy Movie (1995)
Aladdin and the King of Thieves (1996) - Maybe, but not sure.
Pooh's Grand Adventure: The Search for Christopher Robin (1997) - See above about Winnie the Pooh.
Beauty and the Beast: The Enchanted Christmas (1997)
Beauty and the Beast: Belle's Magical World (1998)
Pocahontas II: Journey to a New World (1998)
The Lion King II: Simba's Pride (1998)
Mickey's Once Upon a Christmas (1999)
Doug's 1st Movie (1999)
The Tigger Movie (2000)
An Extremely Goofy Movie (2000)
The Little Mermaid II: Return to the Sea (2000)
Recess: School's Out (2001)
Lady and the Tramp II: Scamp's Adventure (2001)
Cinderella II: Dreams Come True (2002)
The Hunchback of Notre Dame II (2002)
Return to Never Land (2002)
Stitch! The Movie (2003)
101 Dalmatians II: Patch's London Adventure (2003)
The Jungle Book 2 (2003)
Atlantis: Milo's Return (2003)
Piglet's Big Movie (2003) - See above about Winnie the Pooh.
Recess: Taking the Fifth Grade (2003)
The Lion King 1 1/2 (2004)
Winnie the Pooh: Springtime with Roo (2004) - See above about Winnie the Pooh.
Mickey, Donald, Goofy: The Three Musketeers (2004)
Mickey's Twice Upon a Christmas (2004) - Should have but not sure.
Teacher's Pet (2004)
Pooh's Heffalump Movie (2005)
Kim Possible Movie: So the Drama (2005) - Should have but I'm not sure. And I did love watching Kim Possible the series!
Mulan II (2005)
Tarzan II (2005)
Lilo & Stitch 2: Stitch Has a Glitch (2005)
Pooh's Heffalump Halloween Movie (2005) - See above about Winnie the Pooh.
Kronk's New Groove (2005)
Leroy & Stitch (2006)
Bambi II (2006)
Brother Bear 2 (2006)
The Fox and the Hound 2 (2006) - I remember hating this one. ^-^' I liked most sequels but, after all, the original was my favorite and set a very high bar for child me on this.
Cinderella III: A Twist in Time (2007)
Disney Princess Enchanted Tales: Follow Your Dreams (2007)
The Little Mermaid: Ariel's Beginning (2008)
Tinker Bell (2008)
Tinker Bell and the Lost Treasure (2009)
Tinker Bell and the Great Fairy Rescue (2010)
Phineas and Ferb the Movie: Across the 2nd Dimension (2011)
Secret of the Wings (2012)
Planes (2013)
Planes: Fire & Rescue (2014)
The Pirate Fairy (2014)
Tinker Bell and the Legend of the NeverBeast (2015)
Phineas and Ferb The Movie: Candace Against the Universe (2020)

I'm sure I've seen more of the sequels but I'm going on the side of caution and just saying I didn't.

PIXAR
Toy Story (1995)
A Bug's Life (1998)
Toy Story 2 (1999)
Monsters, Inc. (2001)
Finding Nemo (2003)
The Incredibles (2004)
Cars (2006)
Ratatouille (2007)
WALL-E (2008)
Up (2009)
Toy Story 3 (2010)
Cars 2 (2011) - lol, I still don't know why this is the only Pixar movie I've never seen. I saw the last few minutes once.
Brave (2012)
Monsters University (2013)
Inside Out (2015)
The Good Dinosaur (2015)
Finding Dory (2016)
Cars 3 (2017) - I watched this one like three times, which makes the Cars 2 thing even funnier.
Coco (2017)
Incredibles 2 (2018)
Toy Story 4 (2019)
Onward (2020)
Soul (2020)
Luca (2021)

MISC (Live-action/animation hybrids, Touchstone films, etc. Anything that didn't fit into the other categories, basically)
The Reluctant Dragon (1941)
Song of the South (1946)
So Dear to My Heart (1949)
Mary Poppins (1964)
Bedknobs & Broomsticks (1971)
Pete's Dragon (1977)
Who Framed Roger Rabbit (1988)
The Nightmare Before Christmas (1993)
James and the Giant Peach (1996)
Enchanted (2007)
Frankenweenie (2012)
Pete's Dragon (Remake) (2016)
Mary Poppins Returns (2018)