Dan Gordon Wieden (/ˈwaɪdən/; March 6, 1945 – September 30, 2022) was an American advertising executive who co-founded ad firm Wieden+Kennedy.

[2] Wieden attended Ulysses S. Grant High School in northeast Portland, where he was on the swim team.

[4] One of the new firm's main accounts was Nike, with Wieden coining the "Just Do It" tagline for the sportswear company in 1988.

[1][5] Wieden and David Kennedy were listed as number 22 on the Advertising Age 100 ad people of the 20th century.

[7] Wieden was the founder of Caldera, a nonprofit arts education organization and camp for at-risk youth located in Sisters, Oregon.