Resident Population in Kennebec County, ME was 127.25900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Kennebec County, ME reached a record high of 127.25900 in January of 2023 and a record low of 95.30600 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Kennebec County, ME - last updated from the United States Federal Reserve on May of 2024.