This Data Point examines the school start time for public high schools in the United States by selected characteristics and state. It uses data from the School Questionnaire of the 2017-18 National Teacher and Principal Survey (NTPS), which is both a state and nationally representative sample survey of public and private K-12 schools, principals, and teachers in the 50 states and the District of Columbia. The selected school samples include about 10,600 traditional and charter public schools and 4,000 private schools.