Dalton is a hamlet and census-designated place in the towns of Nunda and Portage in Livingston County, New York, United States. The population was 362 at the 2010 census. Dalton is in southwestern Livingston County, primarily in the southwestern part of the town of Nunda, with a small portion crossing into the southeastern part of the town o…Dalton is a hamlet and census-designated place in the towns of Nunda and Portage in Livingston County, New York, United States. The population was 362 at the 2010 census. Dalton is in southwestern Livingston County, primarily in the southwestern part of the town of Nunda, with a small portion crossing into the southeastern part of the town of Portage. New York State Route 70 passes through the northern part of the community, leading northwest 6 miles to Portageville and southeast 11 miles to Canaseraga. State Route 408 leads north from SR 70 2.5 miles to the village of Nunda.