Which states were involved in the louisiana purchase?

The whole states were Arkansas, Iowa, Missouri, Kansas, Oklahoma, and Nebraska. There are many more parts of states that came with the purchase and if you need more information google it :)

The obtained domain incorporated the entire of today's Arkansas, Iowa, Missouri, Kansas, Oklahoma, and Nebraska, parts of Minnesota and Louisiana west of Mississippi River, including New Orleans, enormous parts of North and northeastern New Mexico, South Dakota, northern Texas.