Says You! is a word game quiz show that airs weekly in the United States on public radio stations. Richard Sher created the show in 1996 with the guiding philosophy: "It's not important to KNOW the answers: it's important to LIKE the answers." The first episode to broadcast on radio took place in Cambridge, Massachusetts in February 1997.

Recorded in front of live audiences in theaters around the United States, the show is produced in Boston, Massachusetts. Its format, emphasis on witty repartee, and its tagline—"a game of bluff and bluster, words and whimsy"—are reminiscent of the similarly long-running BBC program My Word! (1956–1990). The first ten seasons of Says You! aired in a half hour timeslot before expanding to one hour in 2006. Season 21 of Says You! marked the show's 500th episode.

Richard Sher hosted Says You!'s first eighteen seasons, before dying on February 9, 2015. Original panelist Barry Nolan took over as host for the next two seasons, before returning to his seat as a panelist in early 2017. He was replaced as host by occasional panelist Gregg Porter of Seattle's KUOW-FM, with author/public radio contributor Dave Zobel (who came on as a Says You! writer after Sher's death) frequently guest hosting in 2018 & 2019 when Porter was absent or returning as a panelist. Porter left Says You! in the summer of 2019, with Zobel serving as permanent host until the end of season 25. Richard Sher's son Ben (who voiced the episode-ending Pipit & Finch credit as a child and later served as a guest scorekeeper) hosted the final first-run episodes in September 2022.

The COVID-19 pandemic forced taping for season 24 to conclude earlier than expected, with the last first-run episode with a live audience airing from Palo Alto, California on May 1, 2020. The remainder of the season and the entirety of season 25 consisted of new episodes recorded via Zoom or without a live audience, supplemented by reruns as well as twenty-one "Back 9" episodes, featuring 9 rounds taken from three episodes apiece of early half-hour seasons. The final four first-run episodes featured a remote audience of ticket-buyers watching from home, with the last of these airing on August 13, 2021, with the season concluding primarily with "Back 9" re-airings.

At the end of the 25th season, executive producer Laura Sher announced that production was ending and further seasons would consist of rebroadcasts. Season 26 premiered on October 8, 2021, and consisted of repeats from the show's eighth & ninth seasons, with Season 27 in 2022-23 featuring episodes from the tenth-twelfth seasons, Richard Sher's final episode from season 18, and unedited half hour episodes. Two final live episodes with studio audiences were held in Seattle & San Francisco at the start of season 27, featuring most of the original panelists and Richard Sher's son Ben as host, but have not yet been aired on the radio.

Over 250 episodes can be heard for free on-demand via Public Radio Exchange, including all first-run and Back 9 episodes from seasons 18-25, and all of the succeeding seasons' reruns. Says You!'s official website posts new episodes on a one week delay from PRX, while also selling over 370 episodes from seasons 1-6 and 11-20 in their online store.