Catholicate College has library established in 1952 to meet the needs of its students and staff. It has a wide range of library books, catering to the need of the college and making it as one of the largest college libraries in Kerala. The library has books in ,Malayalam, English, and in Hindi. The library is spread over 8000 sq ft and has a seating capacity for 80 students. The Library has a total of 69241 books of which 35242 are textbooks and 34999 are reference books. It also subscribes to 51 magazines/ journals. Apart form this; there are 4 departmental libraries one each for biochemistry, biology, chemistry and mathematics. It has 23 Indian journals and 4 foreign journals. It also has 937 back volumes of journals.
The library has for Broad band connectivity. The library is linked to each department and faculty and students can access books from any of the terminals provided in the college. The library is open all the days except Sundays and national holidays. It operates from 8.30 am to 5 pm form Monday to Friday and 8.30 am to 2.30pm on Saturdays. Library gives open access to students and staff. A student can issue two books in his/her name at time and keep the book for 15 days if it is a textbook. Reference books are not allowed to take out of the library. Staff members are allowed to keep up to 10 books for a period of one year.