Resident Population in Oklahoma was 4095.39300 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Oklahoma reached a record high of 4095.39300 in January of 2024 and a record low of 800.00000 in January of 1900. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Oklahoma - last updated from the United States Federal Reserve on February of 2026.