The Delta Regional Authority (Delta Region) is a federally designated region of 252 counties and parishes in the eight state Lower Mississippi Delta Region states. More than one in five residents in the Delta Region live below the poverty line, and roughly one-third of residents are Black. Further, more than forty percent of Delta Region residents live in rural counties, and more than ninety percent of counties are designated as health provider shortage areas. All of these characteristics make the region vulnerable to numerous health disparities—including breast cancer disparities. The Delta Region overall has a higher breast cancer mortality rate than the rest of the country, and nine of the top ten counties for breast cancer mortality rates are in the Delta Region. This presentation will describe how NAACCR’s CiNA Deluxe data were used to examine disparities in breast cancer subtype and staging in the Delta Region.