Following the very successful first and second Workshop on Gallium Oxide and Related Materials, held in Kyoto and Parma, the third edition of this meeting will take place in Columbus Ohio. The workshop will take place from August 12-15th 2019. The workshop will focus on gallium oxide and its ternary alloys with indium and aluminium, as well as on related materials such as indium oxide and tin oxide. The workshop aims to bring together scientists and engineers working on different aspects of material and device technology. A friendly and stimulating environment will facilitate discussions. This year, the workshop will host a special session featuring the US Gallium Oxide Workshop, GOX 2019.