This survey asked U.S. adults how they might behave in three major aspects of contact tracing in the context of the coronavirus outbreak: the likelihood that someone would speak with a public health official (i.e., a contact tracer) who contacted them about the coronavirus; the degree of comfort that someone would have in sharing information like the names of people with whom they have been in physical contact and the places they have recently visited, or data from their cellphone that tracked their locations; and their willingness to quarantine for 14 days if they were advised to do so by a public health official.