Oasis are from Manchester, England—the band formed there in 1991 with Liam and Noel Gallagher as the core members. The most commonly cited origin point is their emergence from the Manchester music scene, with their early years tied to the city and its surrounding areas. Key points about their origin:

• Formation and early lineup: Oasis formed in Manchester in 1991, initially with Liam Gallagher (vocals) and Noel Gallagher (guitar/vocals) joining the band that became Oasis, after arising from the earlier group The Rain. This places their origins squarely in Manchester.

• Hometown association: While often associated with Manchester as a whole, the Gallagher brothers grew up in Burnage, a suburb in the southern part of Manchester, which is frequently highlighted as their formative environment.

• Cultural context: Oasis rose to prominence as a defining Britpop act of the 1990s, a scene strongly rooted in Manchester’s musical landscape, though they achieved global fame beyond the city.

If you’d like, I can pull up concise sources that confirm their Manchester origins and the Burnage connection from reliable references.