Olive is a town in Ulster County, New York, United States. The population was 4,419 at the 2010 census.
According to the United States Census Bureau, the town has a total area of 65.1 square miles (169 km), of which, 58.7 square miles (152 km) of it is land and 6.5 square miles (17 km) of it (9.93%) is water.
As of the census of 2000, there were 4,579 people, 1,869 households, and 1,263 families residing in the town. The population density was 78.0 people per square mile (30.1/km²). There were 2,306 housing units at an average density of 39.3 per square mile (15.2/km²). The racial makeup of the town was 96.68% White, 0.61% African American, 0.17% Native American, 0.92% Asian, 0.17% Pacific Islander, 0.48% from other races, and 0.96% from two or more races. Hispanic or Latino of any race were 2.51% of the population.
There were 1,869 households out of which 29.8% had children under the age of 18 living with them, 55.4% were married couples living together, 7.9% had a female householder with no husband present, and 32.4% were non-families. 24.5% of all households were made up of individuals and 8.5% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 2.91.
In the town, the population was spread out with 24.2% under the age of 18, 4.6% from 18 to 24, 26.6% from 25 to 44, 31.1% from 45 to 64, and 13.6% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 99.1 males. For every 100 females age 18 and over, there were 96.0 males.
The median income for a household in the town was $45,409, and the median income for a family was $50,931. Males had a median income of $33,125 versus $27,008 for females. The per capita income for the town was $21,569. About 3.5% of families and 5.0% of the population were below the poverty line, including 4.6% of those under age 18 and 3.6% of those age 65 or over.