There are 23 Catholic high schools in the Archdiocese of New Orleans. The Clarion Herald has the latest, in-depth information on each school, along with a tuition chart (page 5) and Open House dates for each school (page 20).
Clarion Herald, High School Information supplement: The information in the attached chart (PDF) was provided by the individual schools. The money figures include tuition, registration and all required fees for the 2018-19 school year.