Robert John Arthur "Rob" Halford (born August 25, 1951 in Birmingham, England), is the lead vocalist for the British heavy metal band Judas Priest. Halford is known for his multi-octave operatic range, high-pitched screams and leather-clad image. His stud-leather style has been widely adopted by heavy metal performers and fans around the world.

Because of his enormous influence on rock and metal music, Halford has been nicknamed the 'Metal God'.

Before Judas Priest, Halford was in the bands Hiroshima, Abraxas, Thark, Lord Lucifer, and Athens Wood.

After a 20-year career with Judas Priest, that saw the band achieve international fame, Halford left the band in 1992 to pursue a solo career. He first formed the band Fight and then explored new territories with his industrial-influenced project called Two (often spelled 2wo). He later formed the band Halford and returned to his metal roots by releasing the widely acclaimed album Resurrection (2000). In July of 2003, Halford reunited with Judas Priest who have since released a new full length album, Angel of Retribution. The recent world tour that accompanied the release marked the band's 30th anniversary.

Rob Halford has also performed as the vocalist for Black Sabbath at three shows. He filled in for Ronnie James Dio for two shows on November 14 and November 15, 1992, following the end of the Dehumanizer tour, when Dio refused to participate in the band as an opening act for original vocalist Ozzy Osbourne. On August 26, 2004, Halford filled in for Osbourne for an Ozzfest show in Camden, New Jersey, due to Osbourne being unable to perform because of bronchitis.

In 1998, Halford revealed his homosexuality in an interview on MTV. His sexuality was known to the rest of the band and came as little surprise to fans. The response from the heavy metal community has been widely accepting.