Delaware County is located in the Central Leatherstocking Region of New York State. It is bordered by Otsego County to the north, Schoharie County to the east, Sullivan County to the south, and Broome County to the west. The county seat is Delhi. The county was established in 1797 and is named after the Delaware River.

The county government is composed of a Board of Supervisors, a County Administrator, and various departments. The Board of Supervisors is responsible for setting policy and overseeing the county's budget. The County Administrator is responsible for implementing the policies set by the Board of Supervisors and managing the day-to-day operations of the county.

The county is served by the Delaware County Sheriff's Office, the Delaware County Department of Social Services, the Delaware County Department of Health, and the Delaware County Department of Mental Health.

For the most up-to-date and in-depth information, please check the public records links below.