Brett Johnson is an Australian rules footballer, and is currently the captain of the Williamstown Football Club in the Victorian Football League.
A midfielder, Johnson was selected in the 1999 AFL Draft at pick No. 23. He was recruited to Hawthorn where he spent four seasons from 2000–2003 before being traded to Carlton for pick No. 51. He spent a lot of time at the Hawks playing for its VFL-affiliate, the Box Hill Hawks, but Carlton's willingness to give recycled players another chance to resurrect their careers saw Johnson join the Blues. He spent two seasons at Carlton, playing 32 games, before being delisted at the end of the 2005 season.
After his AFL career, Johnson had a successful VFL career at Williamstown. He joined the Seagulls in 2006 and was club captain from 2007–2011. He has twice finished second in the J. J. Liston Trophy, represented the VFL in interstate matches in 2007, 2008 and 2010, was selected in the VFL team of the year in 2006, 2007 and 2008, and won the Seagulls' Best and Fairest in 2008 and 2010. As captain, Johnson led the Seagulls to victory in the inaugural Foxtel Cup competition in 2011. He is a life member of the VFL, after having played his 175th league game in 2011.