Dublin is located at . According to the 2010 census, Dublin has a total area of, of which is land and is water.
Demographics
2010 census
As of the census of 2010, there were 790 people, 325 households, and 210 families living in the town. The population density was. There were 367 housing units at an average density of. The racial makeup of the town was 98.0% White, 0.3% African American, 0.5% Asian, and 1.3% from two or more races. Hispanic or Latino of any race were 0.9% of the population. There were 325 households, of which 31.1% had children under the age of 18 living with them, 52.0% were married couplesliving together, 9.2% had a female householder with no husband present, 3.4% had a male householder with no wife present, and 35.4% were non-families. 30.8% of all households were made up of individuals, and 17.6% 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 3.05. The median age in the town was 42.1 years. 22.9% of residents were under the age of 18; 7.3% were between the ages of 18 and 24; 23.3% were from 25 to 44; 27.7% were from 45 to 64; and 18.7% were 65 years of age or older. The gender makeup of the town was 47.2% male and 52.8% female.
2000 census
As of the census of 2000, there were 697 people, 263 households, and 203 families living in the town. The population density was 1,295.0 people per square mile. There were 283 housing units at an average density of 525.8 per square mile. The racial makeup of the town was 99.28% White, 0.14% Asian, and 0.57% from two or more races. Hispanic or Latino of any race were 0.57% of the population. There were 263 households, out of which 37.6% had children under the age of 18 living with them, 61.2% were married couples living together, 9.9% had a female householder with no husband present, and 22.8% were non-families. 20.2% of all households were made up of individuals, and 12.5% had someone living alone who was 65 years of age or older. The average household size was 2.65 and the average family size was 3.03. In the town, the population was spread out, with 28.1% under the age of 18, 7.2% from 18 to 24, 27.7% from 25 to 44, 23.2% from 45 to 64, and 13.8% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 90.4 males. For every 100 females age 18 and over, there were 86.2 males. The median income for a household in the town was $31,111, and the median income for a family was $31,488. Males had a median income of $29,028 versus $17,500 for females. The per capita income for the town was $13,656. About 8.6% of families and 13.9% of the population were below the poverty line, including 23.9% of those under age 18 and 5.7% of those age 65 or over.
