Erleigh N Wiley graduated from Kaufman High School. She attended college at Texas Tech University in Lubbock, Texas with a major in Finance. Attended law school at the University of Texas, School of Law in Austin, Texas and was admitted to the Texas Bar in 1989.
After graduation from law school, began work for the Dallas County District Attorney's Office. Supervisor of Child Protective Services (CPS)/Juvenile cases in the Dallas County family courts, managing fourteen courts. In 2002 elected as the County Court-at-Law Judge in Kaufman County, a court with general jurisdiction, presiding over family, civil, and criminal matters. She was appointed by Governor Perry as the District Attorney of Kaufman County in 2013.