El Dorado and Union County

Established in 1829, the largest county in Arkansas is Union County, sprawling 1,000 square miles along the state line with Louisiana. In between the county's pine forests and wilderness are little hamlets and winding roads that anchor the "city of black gold," El Dorado, the county seat.

The history of Union County is about the land and its people, from the first settlers to those who marched off to war. It is also about a seismic shift from a sleepy small town supported by farming and timber to a great boomtown with the striking of oil in 1921. Thousands of people poured in, and the area would never be the same again, with the impact spanning the next century. Even after the great heady days of the oil boom were in the past, Union County and El Dorado would diversify their industry for the future.

Author Ray Hanley is a retired health care and IT executive. He is one of the most published historians in Arkansas, with over 21 books published and a daily newspaper feature, Arkansas Postcard Past, in the Arkansas Democrat Gazette, appearing since 1986. El Dorado and Union County's history is told here in vivid postcards and historic photographs with the assistance of the South Arkansas Historical Preservation Society.