Welcome to Delaware County! Use the top navigation bar to find more detailed information about our county. History of County Site Coordinator: James (Jim) H. Carroll Towns of Delaware County, Oklahoma are: Bernice Brush Creek Bull Hollow Cayuga Cleora Chloeta Cloud Creek Colcord Copeland Dennis Dodge Dripping Springs Flint Creek Grove Jay (County Seat) Kansas Leach New Eucha Oaks Old Eucha Rocky Ford Sycamore Tagg Flats Twin Oaks West Siloam Springs Zena Delaware Co. Mailing List - correspond with others discussing research in this area. Neighboring Counties Oklahoma : Ottawa - Craig - Mayes - Cherokee - Adair Missouri: McDonald  Arkansas: Benton The 1930 Federal Census of Oklahoma is now available at the Grove Public Library. The Delaware County Genealogical Society purchased the census and donated them to the Grove Public Library. The microfilm is available at the library to everyone.  Historical Maps of Oklahoma - off-site resource All Oklahoma Counties - Listing of all counties. State Resources - Quick links to helpful resources for Oklahoma research. Also, don't miss when considering Delaware County.