Resident Population in Lea County, NM was 75.15100 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Lea County, NM reached a record high of 75.15100 in January of 2024 and a record low of 48.90000 in January of 1973. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Lea County, NM - last updated from the United States Federal Reserve on April of 2026.