Baw Baw Shire has an estimated population of 48,479 (as at 1 August 2017). The municipality is experiencing rapid residential growth with a 13.1 per cent growth rate between 2011 and 2016, or an increase of 5,616 people.

Population modelling has predicted the shire will continue growing at an annual rate of 2.3 per cent to reach 60,452 by 2026. It is expected Baw Baw Shire will have 71,683 residents by 2036, having grown at a rate of over 1.7 per cent annually over the previous decade.

Town populations (according to 2016 census):

Warragul: 15,757

Drouin: 12,349

Trafalgar: 3,912

Yarragon: 1650

Longwarry: 2004