Application and More

The choice of a high school is probably one of the most difficult decisions you have had to make in your life to date.  

You have done your research and feel confident that Rosati-Kain High School is the place for you. We are excited to share the R-K tradition of excellence with you and your family. Welcome to the Kougar family!  To access our application process, please click the Archdiocese link below or fill out our online form for those students not applying through the Archdiocese.


The Archdiocese of St. Louis High School Application is for students who are currently in 8th grade at a St. Louis Archdiocesan Catholic Grade School.  This online application opens on October 1, 2021 and closes November 15, 2021. Qualified students can be admitted, even after the Archdiocese's deadline. Students may click the following link to fill out the application at that time: Archdiocesan High School Application


For all other interested 8th-grade, international, and transfer students, please fill out the form below or CLICK HERE. Please also submit via email or mail three years of official transcripts, test scores, attendance, and discipline records. Emails can be sent to [email protected] and mail can be sent to

ATTN: Registrar

Rosati-Kain High School

4389 Lindell Blvd

St. Louis, MO 63108


After review by Rosati-Kain’s Admissions Committee, applicants meeting Rosati-Kain’s criteria will be notified by letter that their application and supplemental information has been received. If necessary information has not been received or if more discussion regarding an application is warranted, we will contact you for a personal interview. This year, letters of determination will be mailed on January 28, 2022. Qualified students can still be admitted after the application deadline.