There are currently about 2500 Pawnee Indians. 400 of them live in Pawnee, Oklahoma. However, if it wasn't for the harsh treatment of the government, European diseases, and other harmful factors, there would probably be many more.

Bibliography http://college.hmco.com/history/readerscomp/naind/html/na_028300_pawnee
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Lacey, Theresa Jense. The Pawnee. United States of America: Chelsea House Publishers, 1996.
Fradin, Dennis B. The Pawnee. Chicago: Children's Press, 1988.