Cathedral is accredited by the state of Indiana and the Independent Schools Association of the Central States.

1255 students (683 males and 604 females) in grades 9 through 12 from Marion County and its seven surrounding counties.  Students attended approximately 130 different schools before entering Cathedral.

95 faculty members have an average of over 15 years of teaching experience, with the majority holding master's degrees.  With a student-teacher ratio of 13:1, a highly personalized approach to learning is maintained.

There are 11 academic departments providing more than 188 course offerings.  Three instructional levels are offered-honors, academic and college preparatory-as well as honors-level independent study in nearly all disciplines.  A special emphasis is placed on technology in the classroom.  Honors and academic-level English students are required to take two years of foreign language (as listed below).  College preparatory English students and students enrolled in the Language Support Program are not required to meet the foreign language requirement, except in unusual circumstances.

The Language Support Program is available to meet the special needs of the bright, dyslexic student preparing for college entrance.  In this program, courses are taught at the academic level of instruction with appropriate accommodations.