Tungsten oxide is a versatile transition‐metal oxide with a vast number of polymorphs and sub‐stoichiometric compositions, featuring innate tunnels and oxygen vacancies. The structure‐determined nature, such as altered optical absorption and metal‐like conductivity, makes tungsten oxide an attractive candidate for optoelectronic applications. A brief summary of the recent progress in tungsten oxide for optoelectronic applications is provided, including not only the traditional field of electrochromism/photochromism, but also new areas of application, such as visible‐light‐driven photocatalysis, photothermal therapy, and surface enhanced Raman spectroscopy (SERS). Also, the prospects for future applications of tungsten oxide are summarized and highlighted.