In "Rick and Morty", from which dimension do Rick and Morty originate from?

Rick and Morty originate from dimension C-137. This is primarily established in the episode "Close Rick-Counters of the Rick Kind" where the Council of Ricks arrests Rick, accusing him of being the only one from his dimension with a Morty. Additionally, the creators of the show, Dan Harmon and Justin Roiland, have confirmed in various interviews and social media posts that the main Rick and Morty pair we follow throughout the series are from dimension C-137.