Dariusz Swiercz (born 31 May 1994) is a Polish chess player playing for the United States.
He is one of the youngest in history and the youngest Polish of all time to qualify for the title Grandmaster at the age of 14 years and seven months in 2009.
In 2018 he switched his national federation to the United States.Swiercz won the 2011 World Junior Chess Championship at the age of 17 and is currently the only Polish male chess player to accomplish this title.
The following year he also won the Under 18 World Championship.