Porter is located at . According to the 2010 census, Porter has a total area of, of which is land and is water.
Demographics
2010 census
As of the census of 2010, there were 4,858 people, 1,832 households, and 1,310 families living in the town. The population density was. There were 1,978 housing units at an average density of. The racial makeup of the town was 94.3% White, 1.1% African American, 0.3% Native American, 0.9% Asian, 1.6% from other races, and 1.7% from two or more races. Hispanic or Latino of any race were 6.6% of the population. There were 1,832 households of which 35.6% had children under the age of 18 living with them, 56.3% were married couplesliving together, 9.7% had a female householder with no husband present, 5.5% had a male householder with no wife present, and 28.5% were non-families. 21.5% of all households were made up of individuals and 6.1% 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 3.12. The median age in the town was 39.1 years. 25.6% of residents were under the age of 18; 7.6% were between the ages of 18 and 24; 27% were from 25 to 44; 29.2% were from 45 to 64; and 10.7% were 65 years of age or older. The gender makeup of the town was 49.5% male and 50.5% female.
2000 census
As of the census of 2000, there were 4,972 people, 1,844 households, and 1,300 families living in the town. The population density was 788.8 people per square mile. There were 1,966 housing units at an average density of 311.9 per square mile. The racial makeup of the town was 96.14% White, 0.82% African American, 0.22% Native American, 0.58% Asian, 0.62% from other races, and 1.61% from two or more races. Hispanic or Latino of any race were 4.69% of the population. There were 1,844 households out of which 38.4% had children under the age of 18 living with them, 55.8% were married couples living together, 10.8% had a female householder with no husband present, and 29.5% were non-families. 23.3% of all households were made up of individuals and 5.9% had someone living alone who was 65 years of age or older. The average household size was 2.62 and the average family size was 3.12. In the town, the population was spread out with 28.3% under the age of 18, 9.9% from 18 to 24, 32.6% from 25 to 44, 21.5% from 45 to 64, and 7.8% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 95.4 males. For every 100 females age 18 and over, there were 92.7 males. The median income for a household in the town was $50,625, and the median income for a family was $60,254. Males had a median income of $50,799 versus $26,055 for females. The per capita income for the town was $24,615. About 4.9% of families and 6.5% of the population were below the poverty line, including 7.7% of those under age 18 and 1.4% of those age 65 or over.