This article addresses ethnosurvey methodology, a combination of ethnographic and survey research in migrant origin and destination countries, that is designed to elucidate a better understanding of the multiple facets of migration processes. First, the article reviews the utility of ethnosurvey methodology for researching contemporary migration. Second, it outlines the strengths of ethnosurvey methodology with its combination of ethnographic and survey research for allowing study of phenomena for which social embeddedness matters. Ethnosurvey research carried out in the Polish context since the 1990s is used to illustrate both the advantages, for example, complexity of approach, multilevel analyses, ability to capture various forms of mobility, and disadvantages, for example, sampling, methodological foundations, and the value added of mixed methods for ethnosurvey methodology.