The Treaty of the Wabash was an agreement between the United States government and Native American Miami tribes in Indiana on November 28, 1840.

On November 28, 1840, the United States government entered negotiations with the Miami tribe of northwestern Indiana seeking to purchase their land for white settlement.

The land purchased was in the region of the headwaters of the Wabash in north central Indiana, and constituted no more than about 500,000 acres.

The annual payments were to be paid at Fort Wayne until the tribe emigrated to lands west of the Mississippi.

The tribe agreed to accept designated lands in the Indian Territory, in present-day Oklahoma as a final place of settlement.