Mason Dixon was an American country music trio, composed of Frank Gilligan (vocals, bass), Jerry Dengler (guitar, banjo) and Rick Henderson (guitar). The band played frequently within the Texas nightclub scene for several years and went on to tour the U.S. and Canada for several more.
The group's first single, released in 1983, was a cover of "Every Breath You Take" by The Police. The group was the first act to have a Top 40 Country Billboard single on an independent record label in the 1980s, with the release of "3935 West End Avenue" in 1987. They signed a recording contract with Capitol Nashville in 1988, who released their fifth studio album, Exception to the Rule. Its title track was their most successful single, reaching the Top 40 of the Billboard Hot Country Singles & Tracks chart and No. 63 on the RPM Country Tracks chart in Canada. Henderson left the group in 1989, to be replaced by Terry "Caz" Casburn (vocals, bass). A second album for Capitol, Reach for It, was completed but never released. Rick Henderson, one of the founding members of the group died in mid December 2009.