The majority of these will be Christmas episodes, but a few might happen on other holidays, or at any random time of year. (The list may also include standalone TV specials.) Some may be more about the episode title, or a song parody, than the actual plot of the episode. There are tons of episodes not included here where a passing reference is made to the Grinch, or some aspect of the special.
Episodes on this page are listed in chronological order of original airdate.

This special aired in 1974. I don't know if the plot was meant to resemble "Grinch" or not, but it put me in mind of that story.

Aired in 1996, in season two of Freakazoid! Not a holiday episode (unless you count Freakazoid's birthday), and not even a parody of "The Grinch," though at one point there's a parody of the song "You're a Mean One, Mr. Grinch."

Aired in 1998, in season six of The X-Files. Basically just the episode's title is a "Grinch" parody.

Aired in 1998, in season three of Just Shoot Me! The episode includes narration similar to the special, as well as a parody of "You're a Mean One, Mr. Grinch" performed by Kelsey Grammer. And of course it makes so much sense for Dennis Finch to act like a Grinch (the fact that his name rhymes with "Grinch" is just the icing on the Grinch-cake that is his personality.) I don't remember much about the episode, but this is probably what I think of most often when I think of "Grinch" parodies.

Aired in 2003, in season fifteen of The Simpsons. Homer sees a cartoon adaptation of A Christmas Carol (which is also a spoof of "Mr. Magoo") on TV and decides to change his ways. But later, for a reason I won't reveal, he decides to make Christmas better for everyone by stealing their gifts, in a weird twist on "How the Grinch Stole Christmas".

Aired in 2006, in season one of The Emperor's New School. This is a Halloween rather than a Christmas episode. The parody is mostly in the title, but I guess the plot is slightly similar, and of course Yzma is always a grinch.

Aired in 2006, in season two of How I Met Your Mother. Lily is referred to as a "grinch" (a stand-in for a worse slur), but she's rather justified in being upset with Ted.

Aired in 2006, in season two of Naturally, Sadie. I don't remember whether I saw this episode or not, but there's a parody of "You're a Mean One, Mr. Grinch."

Aired in 2010, in season two of Glee. Part of the plot involves Sue being a Grinch. The episode also includes covers of two songs from the original special, one being a parody of "You're a Mean One, Mr. Grinch" performed by k.d. lang.

Aired in 2014, in season four of Grimm. As far as I can recall, the episode didn't really have anything to do with "stealing" Christmas, and I certainly wouldn't call Nick a Grinch, but I did feel like mentioning the episode here, just because of the title.

Aired in 2016, in season six of My Little Pony: Friendship Is Magic. Mostly a Christmas Carol parody, but it has shades of a Grinch parody.