The Sir Doug Nicholls Round is an annual event in the Australian Football League which celebrates the culture of Indigenous Australians and the contribution of Indigenous Australian players to the sport.

First established in 2007 as the Indigenous Round, the event was renamed in honour of pioneering Indigenous player and politician Sir Doug Nicholls in 2016. The event was originally staged over a single round of home-and-away matches; since 2019, it has been staged over two rounds. The centrepiece of the Sir Doug Nicholls Round is the Dreamtime at the 'G match, played annually between Richmond and Essendon at the Melbourne Cricket Ground on a Saturday night during the round.

Clubs adopt Indigenous symbols during the round, including wearing specially designed guernseys featuring Indigenous art, and adopting Indigenous versions of their club names.

The AFL Women's competition has an equivalent event, named the Indigenous Round, staged over two rounds each season.

The organised Indigenous round has its origins in two stand-alone fixtures from the early 2000s. The first, the Marn Grook Match, was an annual fixture between Sydney and Essendon in Sydney to contest the Marn Grook Trophy; named after the Indigenous football game of marn grook, it was first played during National Reconciliation Week in 2002, and its first iteration was the inaugural AFL game played at Stadium Australia. The second was the annual Dreamtime at the 'G match, first played between Richmond and Essendon in their home-and-away match played during NAIDOC Week in 2005. At both games, the clubs staged events and pre-match celebrations with the aim of recognising Indigenous culture and the contribution of all Indigenous players to the AFL.

In 2007, the annual Indigenous Round was established by the AFL, extending the celebration of Indigenous culture and players to all matches across the round. The inaugural round was staged from 25 to 27 May 2007, recognising the 40th anniversary of the 1967 Australian referendum (Aboriginals), as well as coinciding with the National Day of Healing on 26 May and National Reconciliation Week from 27 May to 3 June; the round is scheduled on or around that calendar week every year. The Dreamtime at the 'G match has served as the central event of each Indigenous Round since its inception, played on the round's Saturday night until 2024 and on its Friday night thereafter. The Marn Grook Match continued to be contested in Sydney's annual home match against Essendon outside the Indigenous Round until 2013; since 2014, the match has been incorporated into the Indigenous Round and is contested between Sydney and one of its Indigenous Round opponents.

In 2016, the round was renamed after Sir Doug Nicholls, pioneering Indigenous player who had played for Fitzroy in the 1930s, who served as governor of South Australia, and who is the only VFL player of any race to have been knighted. In 2019, the event was extended to cover two consecutive weeks of the season; both rounds are still known as by the singular name Sir Doug Nicholls Round.

In 2021, the AFL Women's competition first introduced its Indigenous Round, also covering two weeks of its home-and-away season. The women's round is not named for Nicholls, retaining the name Indigenous Round.