While the soils at Washita Battlefield NHS could be generally characterized as "sandy", there are in fact ten distinct soil types within the park. They are:
Spur and Port Woodward Loam Miles-Springer Complex Woodward Miles-Nobscot Complex Springer Loamy Fine Sand, Hilly Springer Loamy Fine Sand, Hummocky Yahola Fine Sandy Loam Pratt Loamy Fine Sand, Hilly Lincoln