"I Do' Wanna Know" is a song written by Kevin Cronin that was the lead single from REO Speedwagon's 1984 album Wheels Are Turnin'. It was more of a rocker reminiscent of the songs REO Speedwagon had released in the 1970s than the ballads the band had been successful with in the early 1980s. It had limited success on popular music charts, which was blamed for delaying sales of the album until the release of the follow up single, the ballad "Can't Fight This Feeling." The video to the song was nominated for several awards.

"I Do' Wanna Know" was a throwback to the types of rockers REO Speedwagon had recorded in their earlier days.Allmusic critic Mike DeGagne described the song as "a turbulent ride of clean-cut guitar and up-and-down piano that comes off as well-crafted pop with a bite." Joel Draba-Mann of Johnston Publishing described the song as "a raw track that exhibits the transition the band was undergoing at the time, blending falling pop piano with crisp hard-rock guitar riffs.Digital audio's guide to compact discs described it as "rambunctious and danceable."Billboard Magazine writer Paul Grein described "I Do' Wanna Know" as being "bubblegum-edged."

The lyrics represent the singer's reproachment of a lover he believes is about to leave him. Draba-Mann points out thet that "Do'" in the title is not the affirmative "do" but rather an abbreviation for "don't."

The single had only limited chart success. It peaked at #29 on the Billboard Hot 100, although it did better on the Billboard Mainstream Rock chart where it reached #5. The follow up single from Wheels Are Turnin, "Can't Fight This Feeling," reached #1 on the Billboard Hot 100.Billboard Magazine writer Kim Freeman suggested that the release of "I Do' Wanna Know" before "Can't Fight This Feeling" could be regarded as an "oversight," However, lead singer Kevin Cronin, who authored both songs disagreed, stating that "At that point we'd been out of the public eye for two years...and we wanted to re-establish ourselves as being back with our upbeat shuffle rock 'n' roll stuff," adding that the song "made its point" and that "not all singles are released to be hits." Grein attributed the initial sluggish sales of Wheels Are Turnin prior to the release of "Can't Fight This Feeling" to the fact that "I Do' Wanna Know" "wasn't fully accepted at pop radio."

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