Elk Grove Township is a territory within Cook County that includes parts of Arlington Heights, Mt. Prospect, Rolling Meadows, Des Plaines and Elk Grove Village. Parts of the township are unincorporated and the remaining land is a forest preserve.Elk Grove Township has the authority to levy taxes, provide various services and pass local laws and regulations. The Elk Grove Township office includes a clerk, assessors and highway department. The township also offers a number of senior citizen and youth services and emergency assistance.