Dannemora is a village located primarily in the Town of Dannemora in Clinton County, New York. The population was 3,936 at the 2010 census. The name is derived from Dannemora, Sweden, an iron-making town where early settlers came from.
Most of the Village of Dannemora is in the Town of Dannemora, but the south part of the Dannemora village is located in the Town of Saranac. The community is on the south town line. The ZIP code is 12929.
Primary and secondary education is provided by the Saranac Central School District.
The Village of Dannemora was incorporated in 1901. Permanent settlement had begun in 1838. The early economy was based on mining and smelting iron, but this industry did not become significant until about 1843. Clinton Prison (currently known as the Clinton Correctional Facility) was opened in 1845 to employ convicts to work in the iron industry. As a maximum security facility, it currently houses long-term prisoners and is one of the largest prisons in the state.
From 1900 to 1972, Dannemora also contained the Dannemora Hospital for the Criminally Insane (also known by other names). This facility was used afterwards for a variety of prison programs by the Department of Corrections. As a result, Dannemora has become a synonym among many in New York for the place where the criminally insane go.