Dear Mr. Bolner,
Thank you for posting your request on History Hub!
The U.S. Census Bureau’ website includes the final report of the population numbers compiled from the 1860 federal census. Statistical tables for each State and Territory include population by population by color and condition. You may view the report for Louisiana at https://www2.census.gov/library/publications/decennial/1860/population/1860a-16.pdf?#
We hope this information is helpful. Best of luck with your research!