Search millions of Associated Press news images capturing events around the world from 1800s–today. You'll find everything from the 2016 presidential race to the San Francisco earthquake of 1906. (Available only to UA.)
Openverse (formerly Creative Commons' CC Search)
This tool allows you to search millions of images from a variety of sites. To search for images only, select Images from the All Content drop-down menu. You can filter results by license, file type, source, and more. The “credit the creator” box provides attribution information. Learn more about CC licenses.
New York Public Library Digital Collections
Browse prints, drawings, photographs, maps, videos, and more. NYPL's Digital Collections span a range of historical eras, covering the applied sciences, fine and decorative arts, history, performing arts, and social sciences.
Google's Advanced Image Search lets you filter by image size and type, color, format, region, usage rights, and more.
See best practices for image use for sources of diverse images, copyright considerations, citation guidelines, accessibility advice, tools for doing reverse image searches, and tools for editing images.