The Brummie dialect, or more formally the Birmingham dialect, is spoken by many people in Birmingham, England, and some of its surrounding areas. "Brummie" is also a demonym for people from Birmingham. It is often erroneously used in referring to all accents of the West Midlands, as it is markedly distinct from the traditional accent of the adjacent Black Country, but modern-day population mobility has tended to blur the distinction. For instance, Dudley-born comedian Lenny Henry, Walsall-born rock musician Noddy Holder, Smethwick-reared actress Julie Walters, Wollaston-born soap actress Jan Pearson, Solihull-born motoring journalist and TV presenter Richard Hammond, and West Bromwich-born comedian Frank Skinner are sometimes mistaken for Brummie-speakers by people outside the West Midlands county.

Additionally, population mobility has meant that to a degree, the Brummie accent extends into some parts of the Metropolitan Borough of Solihull, but much of the accent within the borough might be considered to be closer to contemporary RP. For example, Solihull-born presenter Richard Hammond (despite often being referred to as a Brummie) does not speak with a strong Brummie accent but is identifiably from the West Midlands.

The Brummie accent and the Coventry accent are also quite distinct in their differences, despite only 19 miles (31 km) separating the cities. To the untrained ear, however, all of these accents may sound very similar, just as British English speakers may find it hard to distinguish between different Canadian and American accents or Australian and New Zealand accents.