Jupiter's moon Io is the most volcanically active world in the solar system, hundreds of eruptions occurring every year. These eruptions constantly reshape the surface of Io, erasing any signs of impact craters that may have formed from collisions with asteroids and comets. However, a keen-eyed amateur astronomer from Sweden has what may be the first crater ever seen on Io. Jesper Sandberg was browsing through old images from the Galileo spacecraft, which explored the Jupiter system from 1995 to 2003, when he a small, circular feature on Io's surface. The feature, which is about 100 meters across, appears to be a fresh impact crater surrounded by a bright ejecta blanket. Sandberg reported his finding to the Planetary Society, which confirmed that the feature had not been previously or catalogued. The discovery of this crater could provide valuable into the geology and history of Io, as well as the frequency and size of impactors in the outer solar system.