Cosumnes Community Services District Share: Government Agencies Cosumnes Community Services District Visit Website 8820 Elk Grove Blvd Elk Grove, CA 95624-1876 (916) 405-7150 (916) 685-5216 (fax) LinkedIn Facebook Twitter Instagram About Map About The Cosumnes CSD serves an estimated 205,000 south Sacramento County residents in a 157-square mile area. It's award-winning parks and recreation services – including the operation of more than 90 par What's Nearby? Distance: 5 10 15 20 25 50 mi.