Mullumbimby
| Mullumbimby New South Wales | |
|---|---|
| Burringbar Street—Mullumbimby's main street | |
| Coordinates | 28°33′S 153°30′E / 28.550°S 153.500°E | 
| Population | 3,589 (2021 census) | 
| Postcode(s) | 2482 | 
| Elevation | 6 m (20 ft) | 
| Location | 
 | 
| LGA(s) | Byron Shire | 
| State electorate(s) | Ballina | 
| Federal division(s) | Richmond | 
Mullumbimby, locally nicknamed Mullum, is a town in the Byron Shire in the Northern Rivers region of New South Wales, Australia. It promotes itself as "The Biggest Little Town in Australia". It is known for its hippie subculture, and it has been referred to as "Australia's anti-vaxxer capital".
The town lies at the foot of Mount Chincogan in the Brunswick Valley about 9 kilometres (5.5 miles) by road from the coast. At the 2021 census, Mullumbimby and the surrounding area had a population of 3,589 people.
The Bundjalung people were the first people who lived in the area of Mullumbimby before the arrival of Europeans and remain the traditional owners of this place.