The Kasetsart Main Libraries of both campuses have a total of 124,366 volumes of books in english, 126,694 in Thai, 33,000 volumes of theses, 130 roles of microfilm, 41,290 titles of microjacket and 24,000 sheets of microfiche, 1,000 titles of audio visual materials. It subscribes to 1,268 periodical titles in English and 910 in Thai.

The faculty libraries have a total 45,984 volumes of books in English, 43,105 in Thai, 7,476 volumes of theses and 3,775 periodical titles serving their respective fields.

Library services : lending materials, reference, referral inter - library loan and photocopying. On line searching and CD Rom searching available. Kasetsart University Library represents the Thai National AGRIS/CARIS Center and the International Buffalo Information Center (IBIC). It also acts as the National Information Coordinating Center on Agricultural Information.