What is the oldest adult animated sitcom? [closed]

Well, you say "sitcom," so by that definition we're looking for an ongoing series of comedic television shows where the episodes involve the same characters in a more-or-less stable setting.

The first animated television series, by many accounts, was Crusader Rabbit, which ran from 1950-1959. It's not "adult" in any useful sense, and it's arguably too all-over-the-place to be a sitcom (but you include Rick and Morty in your examples, so your mileage may vary.)

Anyhow, we know there weren't any adult animated sitcoms before 1950, because there weren't any animated television shows before 1950.

The real stickler here is what counts as "adult." I see a few possible definitions:

The first is "includes themes and jokes only adults will appreciate." This isn't that helpful, because a great many TV shows will throw in the occasional topical, or even risque, joke for the grownups in the audience.

Another definition is "intentionally targeted at adults as well as kids." The answer by this definition is probably The Flintstones. It was based in large part on "The Honeymooners," which certainly wasn't considered a kiddie show at the time, it was broadcast in the evening, and it included a lot of material that's more from adult experiences than kids'. There were lots of job-related issues, marriage-related issues, references to things like fraternal lodges and golf -- not the sort of thing you write if you're only looking to sell breakfast cereal.

It's a bit hokey now, but most TV was back then. For it's time, it was as much an adult show as the Simpsons.

Just for the sake of completeness, if you want the first animated sitcom that would be considered "for adults" even by modern standards, the answer is probably Wait Till Your Father Gets Home, which was roughly based on All in the Family, and dealt almost entirely with grown-up issues: If you look at the Wikipedia page, pretty much any of those plots would be right at home in, say, King of the Hill, and almost none of them are anything you'd expect to see on Disney XD.

I would look at British cartoonist Ronald Searle and his mid-twentieth century comics (notably, St. Trinian's and Molesworth). Searle is known to be one of Matt Groening's (creator of The Simpsons) inspirations and his comics fit much of what is now common in "adult" cartoons - dark material (including violence, drugs, gangs, weapons, and general naughty behavior) and child characters. These works are not animated, but they "feel" very much like adult cartoons.