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The comedian made the surprise announcement Monday on his "WTF" podcast.
"I've decided that this is it. It's done," Maron said of the comedy series. "There's ways to do more, but this was the vision. This season was the season. And I couldn't be more thrilled about how it came out, how all four seasons came out."
Maron said that this week's two-episode season finale will serve as the series finale.
"I think you'll see that we wrapped the story up in the best way possible," he said. "And I just feel like it's done and I'm thrilled about it."
Furthermore, he said that IFC would probably want to do more, but the cable network hasn't spoken to him about continuing the show, which follows a fictionalized version of Maron, for a fifth season.
"I'm sure [IFC] would be thrilled to do more ... It doesn't cost them a lot," Maron said. "We do it pretty inexpensively, which adds to the challenge. I had amazing people working with me."
More to come...