The application of ground-penetrating radar (GPR) for the mapping of archaeological and gravesite subsurface variations offers a rapid and non-invasive means of providing valuable information. A primary objective in this research was to utilize GPR in differentiating between archaeological and gravesite variability in regard to site and soil properties. GPR data were collected in Florida from prehistoric archaeological sites (e.g. Hontoon Island), historic archaeological sites (e.g. St. Augustine); and eighteenth century (e.g. San Luis/Tallahassee) and modern gravesites in Florida. A GPR system with 500-MHz and 900-MHz antennas was used for the comparative data gathering. Soils were sampled every 20 cm up to a depth of 2 m along GPR transects. The transects were at meter intervals no greater than 2. Soils were analyzed for pH, extractable P, Ca, organic carbon content as well as selected physical properties. The GPR and soil data acquired from these archaeological and gravesites were then modeled to compare application feasibility, methods, and analysis. To aid in interpreting GPR data two and three-dimensional models were created and associated soil analyses were evaluated to produce both a qualitative and quantitative methodological approach in site comparison. Primary expectations from this research included significant differences between site age, site and soil properties and anthropogenic context. The results suggest that soil properties were the primary parameters in site characteristics to differentiate archaeological sites and gravesites with GPR.