List of counties in Delaware

The of  has three counties:, , and , the fewest counties of any U.S. state. The origin of the county boundaries go back to former court districts. The powers of the counties' legislative bodies are limited to issues such as zoning and development.

Politics and government
Each county elects its own legislative body (known in New Castle and Sussex counties as the County Council, and in Kent County as the Levy Court). The counties are able to raise taxes and borrow money. They also have control over garbage disposal, water supply, sewerage, zoning, development, and building codes.

Most functions which are handled on a county-by-county basis in other states—such as court and law enforcement—have been centralized in Delaware, leading to a significant concentration of power in the Delaware state government. The counties were historically divided into, which were used as tax reporting and voting districts until the 1960s. However, the hundreds now serve no administrative role; their only current official legal use is in real-estate title descriptions.

History
Following the English conquest of 1664, all of the land on the western side of the and  was governed as part of the  and administered from the town of. During the brief recapture of the colony by the in 1673, additional court districts were created around  and Whorekill. The latter was also known as Hoornkill, and is now the town of. The court at New Castle was left with the central portion of the colony. The jurisdiction left to the court at became, and the county seat remained at New Castle until 1881 when it was moved to. In 1680, Whorekill District was divided into Deale County and St. Jones County. After this division, Lewes became the county seat of Deale, which was later renamed Sussex County. The former Upland District was named after the settlement of, and was renamed  in 1682. It is now wholly within the present boundaries of.

, the Proprietor of claimed all present-day Delaware, and organized its northern and eastern portions as Durham County, Maryland. However, this county existed only on paper. The southern and western portions of present-day Sussex County were organized as portions of several adjacent Maryland counties and were not recognized as part of Delaware until the was run in 1767. In, with the expansion of Sussex County to the south and west, the county seat was moved to. The county seat of St. Jones (renamed Kent County in 1681 ) is at.

The boundaries between the old districts were not well defined, and there is some indication that before 1682 the Upland District served the Swedish and Finnish population throughout the central, and served the Dutch and the few English.

County information
The (FIPS) code, which is used by the United States government to uniquely identify counties, is provided with each entry. The FIPS code for each county links to census data for that county.