The Wilmington School District 209U district serves all or some of: Wilmington. Wilmington School District 209U School District currently has 7 single family homes for sale with an average list price of $329,785.71 and 3 lots for sale with an average list price of $33,300 that attend the district. The average annual property tax for Wilmington School District 209U School District is $4,035.83.