Daryl Hall & John Oates, commonly known as Hall & Oates, were an American rock duo formed in Philadelphia in 1970. Daryl Hall was generally the lead vocalist; John Oates primarily played the electric guitar and provided backing vocals. The two wrote most of the songs they performed, either separately or in collaboration. They achieved their greatest fame from the mid-1970s to the late 1980s with a fusion of rock and roll, soul music, and rhythm and blues.

Though they are commonly referred to by their surnames, the duo's official and preferred title includes the members' first names. They have been credited on albums as Daryl Hall & John Oates (or Daryl Hall John Oates) on all of their US releases. The duo reached the US Top 40 with 29 of their 33 singles charting on Billboard's Hot 100 between 1974 and 1991. Six of these peaked at number one: "Rich Girl" (1977), "Kiss on My List" (1980), the two 1981 releases "Private Eyes", and "I Can't Go for That (No Can Do)" (also a Hot Soul No. 1), "Maneater" (1982) and "Out of Touch" (1984). Their overall 16 US Top Tens also include "She's Gone", "Sara Smile", "You Make My Dreams", "Family Man", "Say It Isn't So", and "Method of Modern Love". Seven of their albums have been RIAA-certified platinum and six of them gold. In the United Kingdom, they have achieved success with two Top Ten albums and six Top 40 singles, two of which – "I Can't Go for That (No Can Do)" and "Maneater" – reached the Top Ten. The duo have spent 120 weeks in the UK Top 75 albums chart and 84 weeks in the UK Top 75 singles chart.

While the duo had employed a wide variety of session musicians on their recordings, several in particular appear on many of their works and have toured with them, including guitarist G.E. Smith, bassist Tom "T-Bone" Wolk, drummer Mickey Curry and multi-instrumentalist Charles DeChant. In addition, they collaborated with sisters Sara Allen and Janna Allen on songwriting and composing.

In 2003, Hall & Oates were inducted into the Songwriters Hall of Fame. In August 2018, in a 60th-anniversary celebration of Billboard's Hot 100, the duo ranked 18 in a list of the top Hot 100 artists of all time and six in a list of the Hot 100's top duos/groups. They remain the most successful duo of all time, ahead of the Carpenters, the Everly Brothers, and Simon & Garfunkel. In September 2010, VH1 ranked the duo 99th among the 100 greatest artists of all time. In April 2014, they were inducted into the Rock and Roll Hall of Fame, and on September 2, 2016, they received a star on the Hollywood Walk of Fame. In April 2024, Oates indicated that the duo would no longer perform together amidst a legal battle between each other.