The Internet is an ideal tool for gaining quick access to populations, sometimes even thousands of miles away, who have recently experienced a traumatic event. It is also a cost-effective and powerful tool that can be used to study the effects of trauma. However, although adapting trauma research for the Internet, particularly when using surveys, appears relatively straightforward, there are a number of methodological and technological issues that researchers need to be aware of to ensure that the survey runs smoothly and the data are useful. The purpose of this chapter is to highlight some of the methodological issues, including informed consent, confidentiality, and the representativeness of the sample, that should be considered when conducting studies on the Internet, particularly those involving trauma research. We also briefly discuss some of the technological aspects of conducting an Internet-based survey and highlight potential new applications for Internet-based research in the study of how trauma affects individuals.