There is a variety of campus data available for use in research. 

Cal Poly's Office of Institutional Research

• The Office of Institutional Research compiles and publishes data to their website https://ir.calpoly.edu/ dating back to 2008.
• Facilities compiled a chart of annual total enrollment from 1903-1997 here: http://digitalcommons.calpoly.edu/fpcp_pub/75/
• Records of the Office of Institutional Research from 1998-2013 are available here: https://digitalcommons.calpoly.edu/ipa/ 
• More records of Office of Institutional Research and Enrollment prior from 1903-2015 are available in the University Archives in physical format and some have been digitized: https://archives.calstate.edu/collections/c534fs491

Historic demographic and enrollment data 

University Archives collections include enrollment records starting with the first year of enrollment (1903). Data is included for gender, ethnicity and race (since Fall 1973), department, college, year, and other topics. 

University Archives has transcribed some enrollment data that you can request by emailing archives@calpoly.edu

This includes:

• total student enrollment by year
• men/women student enrollment by year
• ethnicity and race by year (1973 to 1995)
• number of graduates by year
• number of international students at Cal Poly from 1950-1992