Resident Population in San Miguel County, CO was 7.86800 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in San Miguel County, CO reached a record high of 8.19500 in January of 2018 and a record low of 1.94900 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in San Miguel County, CO - last updated from the United States Federal Reserve on May of 2024.