Located on US 30 (Joliet St) in Dyer, IN. Dyer is a town in St. John Township, Lake County, Indiana, United States. Dyer placed 97th on the "100 Best Places to Live in the US" by CNN and Money Magazine in 2005. As of 2009, the median income for a household in the town was $76,599 while the mean income for a household in the town was $93,308. The median income for a family was $87,127 and the mean income for a family was $103,563.