Wil Tirion (19 February 1943 – 5 July 2024) was a Dutch uranographer (celestial cartographer). His work, which included star charts and atlases, was widely distributed and renowned by astronomers. Originally a graphic designer, Tirion became a full-time celestial cartographer after the success of his first star atlas, Sky Atlas 2000.0, published in 1981. His second major work, Uranometria 2000.0, contained over 280,000 stars and 10,000 deep-sky objects across two volumes and was published by Willmann-Bell in 1987. Tirion's sky charts have also been published in astronomy magazines and books, as well as on astronomy websites. Tirion's early work was largely done by hand, with computer-generated plots as references. In the mid-1990s, he switched to digital illustration. Tirion died on 5 July 2024 at the age of 81 after a brief illness. The asteroid 4648 Tirion is named for him.

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