Dear Frank Alegria,
Thank you for posting your question on History Hub!
The National Archives has numerous record series related to the Hispanic/Latino experience in the U.S. A great starting point would be the Hispanic/Latino Heritage page found here. Records of the Census Bureau also contain demographic information you're looking for as well. Here's a great resource for information on those records as well :https://www.archives.gov/research/genealogy/census/about. In addition, check out this publication from the Census Bureau directly related to your topic: https://historyhub.history.gov/external-link.jspa?url=https%3A%2F%2Fwww.census.gov%2Fcontent%2Fdam%2FCensus%2Flibrary%2F…
We hope this information is helpful. Best of luck with your research!