Johanna M. Costigan is Editor-at-Large at DigiChina, a project of the Stanford Program for Geopolitics, Technology, and Governance. She is a researcher, writer, and editor focused on emerging technologies in China and U.S.-China tech issues. Previously, she served as DigiChina's Managing Editor.

Costigan has written for outlets including WIRED, MIT Technology Review, the Los Angeles Review of Books China Channel, Australian Financial Review, Foreign Policy, China Books Review, Rest of World, Project Syndicate, ChinaFile, Nikkei Asia, Forbes, and others. She writes a newsletter on science, technology, and history in China called The Long Game.

She has worked as an editor on China tech-related projects for the United Nations, Trivium China, the Paulson Institute, the Asia Society Policy Institute, the National Committee on U.S.-China Relations, the Berggruen Institute, and others. She is currently a member of the Coalition for Independent Technology Research.

Costigan holds an MsC in Contemporary Chinese Studies from the University of Oxford, where her dissertation focused on Chinese social media discourse on China's role in World War II. She completed the Inter-University Program at Tsinghua University in Beijing and studied abroad at Qingdao University. At Bard College, she double majored in East Asian Studies with a focus on Chinese language and literature and Written Arts. She speaks and reads Mandarin Chinese.