Joe Logan Diffie (December 28, 1958 – March 29, 2020) was an American country music singer and songwriter. After working as a demonstration singer in the mid 1980s, he signed with Epic Records' Nashville division in 1990. Between then and 2004, Diffie charted 35 singles on the Billboard Hot Country Songs chart, five of which peaked at number one - his debut release "Home", "If the Devil Danced (In Empty Pockets)", "Third Rock from the Sun", "Pickup Man" (his longest-lasting number-one song, at four weeks), and "Bigger Than the Beatles". In addition to these singles, he had 12 others reach the top 10 and 10 more reach the top 40 on the same chart. He also co-wrote singles for Holly Dunn, Tim McGraw, and Jo Dee Messina, and recorded with Mary Chapin Carpenter, George Jones, and Marty Stuart.

Diffie released seven studio albums, a Christmas album, and a greatest-hits package under the Epic label. He also released one studio album each through Monument Records, Broken Bow Records, and Rounder Records. Among his albums, 1993's Honky Tonk Attitude and 1994's Third Rock from the Sun are certified platinum by the Recording Industry Association of America, while 1992's Regular Joe and 1995's Life's So Funny are both certified gold. His album, Homecoming: The Bluegrass Album, was released in late 2010 through Rounder. His style is defined by a neotraditionalist country influence with a mix of novelty songs and ballads.

Diffie died from complications related to COVID-19 during the pandemic on March 29, 2020, at the age of 61.

Joe Diffie was born into a musical family in Tulsa, Oklahoma, in 1958. His first musical performance came at age 7, when he performed in "The Muffin Man". Diffie's father, Joe R., played guitar and banjo, and his mother sang. Following in his father's footsteps, Diffie began to sing at an early age, often listening to the albums in his father's record collection. Diffie has said that his "Mom and Dad claimed that [he] could sing harmony when [he] was three years old." His family moved to San Antonio, Texas, while he was in the first grade, and subsequently to Washington, where he attended fourth and fifth grades. Later, he moved to Whitehall, Wisconsin, for the years he was in sixth grade and through his sophomore year of high school at Whitehall School District, and eventually moved back to Oklahoma, where he attended high school in Velma. In his last two years in high school, Diffie played football, baseball, and golf and ran track; in his senior year, he was recognized as Best All-Around Male Athlete.

After graduating, he attended Cameron University in Lawton, Oklahoma. Although he initially earned credits toward medical school, he decided against a medical profession after marrying for the first time in 1977 and ultimately dropped out before graduation. Diffie first worked in oil fields, then drove a truck that pumped concrete in the oilfield in Alice, Texas, before he moved back to Duncan to work in a foundry. During this period, he worked as a musician on the side, first in a gospel group called Higher Purpose, and then in a bluegrass band called Special Edition. Diffie then built a recording studio, began touring with Special Edition in adjacent states, and sent demonstration recordings to publishers in Nashville. Hank Thompson recorded Diffie's "Love on the Rocks", and Randy Travis put one of Diffie's songs on hold, but ultimately did not record it.

After the foundry closed in 1986, Diffie declared bankruptcy and sold the studio out of financial necessity. He also divorced his wife, who left with their two children. Diffie spent several months in a state of depression before deciding to move to Nashville, Tennessee. There, he took a job at Gibson Guitar Corporation. While at Gibson, he contacted a songwriter and recorded more demos, including songs that were later recorded by Ricky Van Shelton, Billy Dean, Alabama, and the Forester Sisters. By mid-1989, he quit working at the company to record demos full-time. Diffie also met Debbie, who later became his second wife. That same year, Diffie was contacted by Bob Montgomery, a songwriter and record producer known for working with Buddy Holly. Montgomery, who was then the vice president of A&R at Epic Records, said that he wanted to sign Diffie to a contract with the label, but had to put the singer on hold for a year. In the meantime, Holly Dunn released "There Goes My Heart Again", which Diffie co-wrote and sang the backing vocals. Following this song's chart success, Diffie signed with Epic in early 1990.

The label released Diffie's debut album, A Thousand Winding Roads, at the end of 1990, with Montgomery and Johnny Slate as producers. Its first single, "Home", reached the top of the Billboard Hot Country Songs chart. The song also reached number one on the country music charts published by Radio & Records and Gavin Report, making him the first country music artist to have a number-one debut single on all three charts, as well as the first country music artist to have a debut single spend more than one week in the number-one position at the latter two publications. Diffie co-wrote the album's second and fourth releases, "If You Want Me To" and "New Way (To Light Up an Old Flame)"; both peaked at number two on Billboard, and the former reached number one on the RPM country music charts in Canada. Between these two songs, "If the Devil Danced (In Empty Pockets)" became Diffie's second Billboard number one. The album itself peaked at number 23 on Top Country Albums. Diffie also performed his first concerts in late 1990, touring with George Strait and Steve Wariner. That same year, Cash Box named him Male Vocalist of the year. In 1991, Diffie co-wrote the tracks "Livin' on What's Left of Your Love" and "Memory Lane" on labelmate Keith Palmer's debut album.

Diffie's second album, titled Regular Joe, was released in 1992 and was certified gold by the Recording Industry Association of America. The first two singles from the album both peaked at number five on Billboard: "Is It Cold in Here" and "Ships That Don't Come In", with the latter reaching number one on Radio & Records. "Ships That Don't Come In" was co-written by Dave Gibson, also recording on Epic at the time as a member of the Gibson/Miller Band. The album's third single, "Next Thing Smokin'", made its chart debut one month before "Not Too Much to Ask", a duet that Diffie recorded with Mary Chapin Carpenter for her album Come On Come On. Both of these songs made the country top 20, respectively reaching 16 and 15, and the duet was nominated for a Grammy Award for Best Country Collaboration with Vocals at the 35th Grammy Awards in 1993. The final single from Regular Joe was "Startin' Over Blues" (originally the B-side to "Ships That Don't Come In"), which peaked at number 41. Also included on the album was the ballad "Goodnight Sweetheart", later a top-10 country hit in 1996 for David Kersh.