Elektra Records (or Elektra Entertainment) is an American record label owned by Warner Music Group, founded in 1950 by Jac Holzman and Paul Rickolt. It played an important role in the development of contemporary folk and rock music between the 1950s and 1970s. In 2004, it was consolidated into WMG's Atlantic Records Group. After five years of dormancy, the label was revived as an imprint of Atlantic in 2009. In October 2018, Elektra was detached from the Atlantic Records umbrella and reorganized into Elektra Music Group, once again operating as an independently managed frontline label of Warner Music. In June 2022, Elektra Music Group was merged with 300 Entertainment to create the umbrella label 300 Elektra Entertainment (3EE), though both Elektra and 300 continued to maintain their separate identities as labels. In October 2024, 300 Elektra Entertainment merged with Atlantic Music Group, though still retaining imprints on releases.

Elektra was formed in 1950, as the Elektra-Stratford Record Corporation, with a singles label called Stratford Records, by Jac Holzman and Paul Rickolt in Holzman's St. John's College dorm room. Each invested $300. The usual spelling of the Greek mythological Pleiad Electra was changed. Holzman famously explained, "I gave her the 'K' that I lacked". He found the 'C' in the original name "too soft", but liked the "solid bite" of the letter 'K', citing its use in the Kodak name.

The first Elektra LP, New Songs (EKLP 1 released March 1951), was a collection of Lieder and similar art songs, which sold few copies. During the 1950s and early 1960s, the label concentrated on folk music recordings, releasing a number of best-selling albums by Theodore Bikel, Ed McCurdy, Oscar Brand, and Judy Collins, and protest singers such as Phil Ochs and Tom Paxton. Holzman also recorded Josh White, who was without a record deal as a result of McCarthyite blacklisting.

In 1964, Elektra launched Nonesuch Records. This classical budget label was the best-selling budget classical label of the era. Other labels followed suit by starting their own budget series, but Nonesuch remained the most popular and Jac Holzman states in his book that profits from the budget classical label made it possible for Elektra to experiment with their pop releases by the mid-1960s.

In 1965, Elektra began a short-lived joint venture with Survey Music called Bounty Records, which was Elektra's first foray into pop music. The most notable signing for Bounty was the Paul Butterfield Band who was moved over to Elektra when Bounty folded.

Elektra's entrance into pop gained the label considerable prestige within the music scene by being one of the first labels to sign up leading acts from the new wave of American psychedelic rock of 1966–1967. The label's most important signings were the Chicago-based Paul Butterfield Blues Band (with Mike Bloomfield), the Los Angeles bands Love and The Doors, and the Detroit bands The Stooges and MC5. Included in Elektra's Los Angeles-based signings were Tim Buckley and Bread. In 1968, the label also signed pioneering rock guitar soloist Lonnie Mack to a three-album deal.

Also in 1967, Elektra launched its Nonesuch Explorer Series, one of the first collections of what is now referred to as world music. Excerpts from several Nonesuch Explorer recordings were later included on the two Voyager Golden Discs, which were sent into deep space in 1977 aboard the Voyager 1 and Voyager 2 space probes.

Elektra, along with its Nonesuch Records subsidiary, was acquired by Kinney National Services in 1970, which changed its name to Warner Communications (now Warner Music Group) in 1972. Soon afterwards, Kinney consolidated their label holdings under the Warner-Elektra-Atlantic umbrella. Holzman remained in charge of Elektra until 1972, when it merged with Asylum Records to become Elektra/Asylum Records; Asylum's founder, David Geffen, headed the newly combined label. Holzman, in the meantime, was appointed senior vice president and chief technologist for Warner — ushering the company into home video and the first interactive cable system. Holzman also went on to acquire Discovery Records. In 1975, Geffen stepped down when he was told that he had a terminal illness; He later was revealed to have been falsely diagnosed. He was replaced by Joe Smith, who later went on to become CEO of Capitol Records.