Dietrich Markwart Eberhart Mateschitz (; 20 May 1944 - 22 October 2022) was an Austrian entrepreneur. He was the co-founder and 49% owner of Red Bull GmbH. In April 2022, Mateschitz's net worth was estimated at US$27.4 billion.

Mateschitz worked in marketing for Unilever and Blendax. While travelling in Thailand, he discovered the drink Krating Daeng, which he adapted into Red Bull.