USEA (United States Eventing Association), states by Area
Area I • Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, and Vermont
Area II • New Jersey, Pennsylvania, Maryland, Delaware, Virginia, and North Carolina
Area III • South Carolina, Mississippi, Alabama, Georgia, and Florida
Area IV • Illinois, Iowa, Kansas, Missouri, Minnesota, Nebraska, North Dakota, and Wisconsin
Area V • Arkansas, Louisiana, Oklahoma, and Texas
Area VI • California and Hawaii
Area VII • Oregon, Washington, Idaho, Montana, and Alaska
Area VIII • Indiana, Kentucky, Michigan, Ohio, Tennessee, and West Virginia
Area IX • Colorado, Wyoming, Utah, and South Dakota
Area X • Arizona, New Mexico, and Nevada