U.S. Territory in 1783: What Was NOT Yet Part of the Country

At the Treaty of Paris (1783), U.S. boundaries: Atlantic to Mississippi, Great Lakes to 31° N (Spanish Florida). The following present-day states were not included:

Definitely Outside (Acquired Later)

• Louisiana Purchase (1803): Arkansas, Iowa, Missouri, Kansas, Nebraska, Oklahoma (part), South Dakota, North Dakota, Montana, Wyoming, Minnesota (west of Mississippi), Colorado (part), New Mexico (part), Texas (part), Louisiana.
• Oregon Treaty / Mexican Cession / Gadsden / Annexation (1840s–50s): Washington, Oregon, Idaho, California, Nevada, Utah, Arizona, New Mexico (rest), Colorado (rest), Wyoming (rest), Texas (rest).
• Alaska (1867) & Hawaii (1898) — non-contiguous.

Disputed / Spanish in 1783

• Florida — returned to Spain 1783; acquired 1819 (Adams–Onís).
• Red River Valley (N. Texas/S. Oklahoma) — Spanish claim.

Already Inside (1783)

Original 13 states + western claims ceded by 1787 (Northwest Territory = OH, IN, IL, MI, WI, MN-east).

Quick List (Modern States Wholly/Partly Outside 1783 Border)

Florida, Alabama, Mississippi, Louisiana, Arkansas, Missouri, Iowa, Minnesota (west), North Dakota, South Dakota, Nebraska, Kansas, Oklahoma, Texas, New Mexico, Colorado, Wyoming, Montana, Idaho, Washington, Oregon, California, Nevada, Utah, Arizona, Alaska, Hawaii.