is it Nevada
The Persian Gulf has no "south eastern border" -the south western border is Saudi Arabia and the Gulf states and Iran is the north eastern border.
The Mississippi River forms the Western border of the States of Illinois, Tennessee, and Mississippi. The Mississippi River forms the Eastern border of the States of Iowa, Missouri, Arkansas, and Louisiana.
East is Nevada. Southeast is Arizona.
western
The Sierra Nevada mountains are located in the western United States. They are located on the border of California and Nevada.
Washington, Oregon, California
Arizona shares its Southern border with Sonora and Baja Califoria, Mexico. To the North Utah shares its southern border with Arizona, and Arizona's western border is marked by the Colorado River to form a border with California and Nevada. The western border of New Mexico is the eastern border of Arizona and Colorado and Arizona touch each other at the Four Corners Monument.
The eastern border of the United States was still the Atlantic Ocean, but after the Louisiana Purchase in 1803, the western border wasn't well defined. We bought the place from France, and even the French weren't entirely sure what they were selling, or what we were buying. Nominally, the Louisiana Purchase included all of the land drained by the Mississippi River, so the western border should have been the Rocky Mountains and the Continental Divide.
Generally, states in the western part of the US are larger than those in the eastern part. Western states like Texas, California, and Alaska are known for their vast land areas, while eastern states like Rhode Island, New Jersey, and Massachusetts are relatively smaller in size.
1 America! or did u you mean states???? Sincerely, Dr. Lobotomy
The answer you're probably looking for is Washington, Oregon, and California, which are the states in the conterminous US that border the Pacific Ocean ... though Alaska and Hawaii are further west.