The Hinckley Big Rock Community Unit School District 429 district serves all or some of: Big Rock and Hinckley. Hinckley Big Rock Community Unit School District 429 School District currently has 23 single family homes for sale with an average list price of $498,656.30 that attend the district. The average annual property tax for Hinckley Big Rock Community Unit School District 429 School District is $6,137.34.