The final quarter of the twentieth century saw a rise in the incidence of lymphoma, and it is now one of the most common neoplasms in the United States. As our understanding of lymphoma has grown, it has become clear that lymphomagenesis is a complex process and that many of the pathologic subtypes of lymphoma have different etiologies. This has prompted epidemiologists to investigate potential environmental causes of lymphoma. Below is a review of the body of literature that has resulted from these pursuits.