What parts of the continental US today were not part of the U.S. in 1783?

In 1783, the continental United States was primarily composed of the thirteen original colonies and some western territories. Key areas that were not part of the U.S. at that time include Florida, which was under Spanish control, and territories west of the Mississippi River, such as present-day Texas, California, and much of the Midwest. Additionally, parts of the Pacific Northwest were claimed by both Britain and Spain. The U.S. expanded significantly through various treaties and purchases over the following decades.