The American states that were once part of New France include Louisiana and Ohio, among others in the Mississippi River basin and the Great Lakes region. New France covered vast areas including the Mississippi River drainage basin, the Great Lakes, and the Ohio Valley, extending from parts of what are now several central and northeastern U.S. states.

Specifically:

• Louisiana was a major part of French Louisiana in New France.
• Ohio was included in the French territory in the Ohio Valley before being ceded to the British.

These states were within the French colony boundaries before the Treaty of Paris in 1763, after which the land was ceded mainly to Britain and Spain.