Daniel Eric Markel (October 9, 1972 – July 19, 2014) was an attorney and a law professor in the United States who wrote important works on retribution in criminal law and sentencing, with a focus on the role of punishment in the criminal justice system. A native of Toronto, he earned a J.D. degree from Harvard in 2001 and after working briefly as a law clerk and junior associate at a law firm, joined the faculty of Florida State University in 2005.