"Who's Your Daddy?" is a song written and recorded by American country music artist Toby Keith. It was released in August 2002 as the second single from his 2002 album Unleashed. The song reached number one on the US Billboard Hot Country Singles & Tracks (now Hot Country Songs) chart (his sixth consecutive single to top the chart) and peaked at number 22 on the Billboard Hot 100.

Keith said that he had wanted to write the song for a couple years but never could get the melody the way he wanted. In 2001, he was at home and he discovered the perfect melody for it. Keith explained that the song is about a young woman and a sugar daddy who can't get their love life in order.

Keith also says that "It's everything that I ever wanted to put into a song, it's got the groove, it's got the attitude, it's humorous, it's about a sugar daddy. And it's got a real funny little Elvis thing in it, like 'Viva Las Vegas'... it's got a New Orleans piano in it. You should have seen the band light up when we cut that, they didn't want to quit that groove, it was just an unbelievable groove."

Keith's producer, James Stroud, confirmed the band's enthusiasm. "That song was about 10 minutes long, we let the tape run. Of course the cut on the album is not (that long), but they just played it and played it and had a great time," said Stroud.