Resident Population in Tolland County, CT was 150.29300 Thous. of Persons in January of 2021, according to the United States Federal Reserve. Historically, Resident Population in Tolland County, CT reached a record high of 153.24200 in January of 2010 and a record low of 103.44000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Tolland County, CT - last updated from the United States Federal Reserve on May of 2024.