The Mahony Historic District encompasses a residential part of El Dorado, Arkansas north of its downtown area. It was an area of significant development in the years after the 1921 discovery of oil and the ensuing economic boom. The area is bounded on the south by Champagnolle Road, on the west by a line just east of North Madison Avenue, on the north by East 5th Street, and on the east by North Lee Avenue and railroad tracks. It is just over 14 acres (5.7 ha) in size, and includes 94 buildings that contribute to its significance. The streets in the district are laid out in grid form, accounting for the fact that Champagnolle Road runs diagonally from southwest to northeast. Most of the housing in the district consists of modest single-story houses, with simple styling. This is a contrast