This is a list of notable events, premieres, releases, series cancellations and endings, and other business ventures for Nickelodeon in the year 1993.
- July 11 - Weinerville
- September 11 - Legends of the Hidden Temple
- September 18 - Rocko's Modern Life
- November 28 - The Adventures of Pete & Pete
- April 11 - Doug, season 3
- September 26 - Rugrats season 3; Doug season 4
- November 20 - The Ren & Stimpy Show season 3
- What Would You Do?, 90 episodes
- May 1 - Nickamania premieres.
- July 4 - Nickamania ends.
- November 26 - The first Nonstop Nicktoons Weekend airs.
- June - Nickelodeon Magazine resumes publication
- The Ren & Stimpy Show Presents: Stimpy's Invention
- Quest for the Shaven Yak Starring Ren & Stimpy
- October - The Ren & Stimpy Show: Veediots!
- November - The Ren & Stimpy Show: Buckaroo$!
- August 31
- Doug, Volume 1: How Did I Get Into This Mess?
- Doug, Volume 2: Patti, You're the Mayonnaise for Me
- The Ren & Stimpy Show, Volume 1: The Classics
- The Ren & Stimpy Show, Volume 2: The Stupidest Stories
- The Ren & Stimpy Show, Volume 3: The Stinkiest Stories
- Rugrats, Volume 1: Tales from the Crib
- Rugrats, Volume 2: A Baby's Gotta Do What a Baby's Gotta Do
- SNICK, Volume 1: Nick Snicks Friendship
- SNICK, Volume 2: Nick Snicks the Family
- September 21 - The Ren & Stimpy Show: Have Yourself a Stinky Little Christmas
- May - Nickelodeon signs its first movie deal with 20th Century Fox. This deal would have let Nickelodeon and Fox produce theatrical features during the next two years, and would have included movies based on Doug, Ren & Stimpy, and Rugrats. Unfortunately, the contract period ended before Fox could produce a single Nickelodeon movie. By the time the contract ended, only Ren and Stimpy was in production. The other two shows would not only be revived, but get their own movies released later.
- July 6 - Sony Wonder acquires the video distribution rights for Nickelodeon shows for the next three years
- September 1 - Nickelodeon expands into Great Britain, its first expansion outside the US.
- February 19 - Victoria Justice is born
- May 14 - Miranda Cosgrove is born
- June 26 - Ariana Grande is born
- July 26 - Elizabeth Gillies is born
- August 1 - Leon Thomas III is born
Nickelodeon character debuts
- Rugrats: Susie Carmichael
- Legends of the Hidden Temple: Olmec, Temple Guards
- Rocko's Modern Life: Rocko, Spunky, Heffer Wolfe, Filburt, Ed and Bev Bighead, Dr. Paula Hutchison
- Ren & Stimpy is picked up by MTV, where it ran intermittently for about 3 years, making it the first Nicktoon to be seen in the US on both Nick and another channel.