In the last decade, the availability of corpora and the technological advancements of corpus tools have increased dramatically. Applied linguists have greater access to data from around the world and in a variety of languages through websites, blogs, and social networking sites, and there is a high level of interest among these scholars in applying corpora and corpus-based methods to other research areas, particularly sociolinguistics. This innovative guidebook presents a systematic, in-depth account of using corpora in sociolinguistics. It introduces and expands the application of corpora and corpus approaches and tools in sociolinguistic research, surveys the growing number of studies in corpus-based sociolinguistics, and provides instructions and options for designing and developing corpus-based studies. Readers will find practical information on such contemporary topics as workplace registers, megacorpora, and using the web as a corpus. Vignettes, case studies, discussion questions, and activities throughout further enhance students' involvement with the material and provide opportunities for hands-on practice of the methods discussed. Corpus-Based Sociolinguistics is a comprehensive and accessible guide, a must-read for any student or scholar interested in exploring this popular and promising approach to sociolinguistic research.