Oklahoma State University is a public land-grant research university in Stillwater, Oklahoma. OSU was founded in 1890 under the Morrill Act. Originally known as Oklahoma Agricultural and Mechanical College, it is the flagship institution of the Oklahoma State University System that enrolls more than 34,000 students across its five institutions with an annual budget of $1.69 billion for fiscal year 2024. As of Fall 2023, 26,008 students are enrolled at the university. OSU is classified among "R1: Doctoral Universities – Very high research activity". According to the National Science Foundation, OSU spent $198.8 million on research and development in 2021.