Kathryn Mary (Kathi) Irvine is an American research statistician for the United States Geological Survey (USGS), affiliated with the Bozeman Environmental and Ecological Statistics Research Group, at the USGS Northern Rocky Mountain Science Center in Bozeman, Montana. Her research involves environmental statistics including both the fundamentals of spatial statistics and its application to wildlife populations including bats, pikas, elk, pine trees, and sagebrush steppes.