I loved Hunter when I was a kid, but I had forgotten all about it.
According to Jim is the definitive answer. When I heard that Arrested Development was cancelled and AtJ was renewed, I knew we were in trouble as a culture.
I will also submit The King of Queens, for all I know that show might still be running!
Only everybody who was born before 1960. 
I’ve got one for ya: Lamp Unto My Feet. 31 seasons.
The Yes, Dear couple had a cameo on Raising Hope the other week, Greg Garcia’s current show, which has already been linked to the My Name is Earl “universe” before. I only recognized the guy as the “guy from the cable company ads” and his new recurring role on Justified, because I never watched Yes, Dear. It was only when I was reading the review of the episode at the AVClub site that I found out that they were playing their old Yes, Dear characters. Now I suddenly feel like I need to seek out Yes, Dear reruns because I love the rest of the Garcia-verse.
To me the most memorable episode was the one where David Spade got offered a threesome (though he was really being pranked). Great wordless scene (to a soundtrack of “Surf City”: “Two girls for every boyyy…”) in which he runs around making elaborate preparations for his date, and every time he explains the circumstance to a male merchant–holding up two fingers–they suddenly become enthusiastically cooperative.
It wasn’t so much preparations as it was a list of things one of the women needed to get done before leaving the country the next day. So Dennis had to get her cleaning, her dog groomed, her passport renewed(!), and a bunch of other stuff before that evening. When he finally got it all done, there was a crowd of guys following him, rooting him on.
Wings was the show I thought of before even opening the thread.
How about “The Tommy Hunter Show”? I’m sure someone’s grandma and grandpa must have been watching it for the 27 years it was on (Canadian) TV, but I never met one.
Another show that’s not (AFAIK) in sydnication, and won’t get a full DVD release because of music rights.
I submit Touched by an Angel. Nine seasons, 211 episodes according to Wikipedia.
This may not qualify, but Charlie Rose’s PBS show has been on since 1991 and it’s still being aired. Likewise The McLaughlin Group, which premiered in 1982. BYE BYE!
A challenger appears. Coach was on for 9 seasons.
Followed by perhaps the best ever use of the “slow clap.”
I watched it and I hated to see it end. 
Family Matters was too.
God bless you two always!!!
Holly
Damn, there’s a lot more long-running forgettable crap TV than I thought. In a world where it seems like they are eager to cancel a show halfway through the premier episode, I’m surprised there is so much of this.
Great submissions everyone! Keep 'em coming 
The thing is, I have heard of these shows. In my mind something like Valerie/The Hogan Family which was on for five years and 110 episodes, is barely remembered by anyone (me included) but still ran for half a decade.
Simon & Simon ran for 8 seasons.
I came to say *According To Jim *but I gotta say…I don’t remember a single thing about Yes Dear.
As an avid consumer of pop culture I usually no a little about shows that I’ve never seen but I’m drawing a total blank on Yes Dear.
I have never heard anyone talk about The Red Skelton Show (1951-1971), even though it was rated in Nielsen’s Top 15 for 15 of its 20 seasons, including nine seasons in the Top 10.
There are plenty of Red Skelton fans and references that I know about, personally.
According to Jim is a good choice except that it has that one memorable quality about it (famous brother).
I’ve NEVER heard of Yes, Dear… ever. In my life. I can’t believe it was on from 2000-2006… my formative years, so to speak. When I was watching a lot of TV. And I’ve never even heard of it! Never broke the top #20 in rankings (even Wings managed that). I don’t know anything, literally anything about this show, and it’s not even that old.
Even though 6 seasons isn’t that long, I think this definitely is in the lead right now for most forgettable while longest running.
Coach, Drew Carey Show, 7th Heaven… at least I think a lot of people know about those shows. 7th Heaven was WB’s most successful show ever (which isn’t saying much if you look at overall ratings, but still).
I’ll top that: The Danny Thomas Show.
Never shown in re-runs in at least 15 years.
Yet, Danny Thomas was a big star.
Today–forgotten.
To me, 7th Heaven never should have ended.
God bless you always!!!
Holly
P.S. Thank God for the GMC station.
They show reruns of it on IFC, of all places.