Lucille Mulhall (October 21, 1885 – December 21, 1940) was a well-known cowgirl and Wild West performer.
She was born in St. Louis, Missouri to Zach and Agnes Mulhall. Her parents brought her to the Oklahoma Territory in 1889. She was raised on her family's Mulhall Ranch in Oklahoma Territory, near what is now Mulhall, Oklahoma.
Known as one of the first women to compete with men in roping and riding events, she was called Rodeo Queen, Queen of the Western Prairie, and Queen of the Saddle (among many other appellations). She starred in the Miller Brothers' 101 Ranch Wild West Show, formed her own troupe in 1913 and performed in many rodeo and Wild West shows throughout her career. She produced her own rodeo in 1916. She retired to her family's ranch in Mulhall around 1922.
Mulhall died in Logan County, Oklahoma, in an automobile accident less than a mile from the Mulhall Ranch.