As of the census of 2000, there were 7,710 people, 2,810 households, and 2,121 families residing in the town. The population density was . There were 2,993 housing units at an average density of . The racial makeup of the town was 97.17% White, 0.64% African American, 0.38% Native American, 0.53% Asian, 0.04% Pacific Islander, 0.18% from other races, and 1.06% from two or more races. Hispanic or Latino of any race were 0.92% of the population.
There were 2,810 households, out of which 35.3% had children under the age of 18 living with them, 63.7% were married couples living together, 8.0% had a female householder with no husband present, and 24.5% were non-families. 20.0% of all households were made up of individuals, and 9.0% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 3.13.
In the town, the population was spread out, with 26.5% under the age of 18, 6.8% from 18 to 24, 30.0% from 25 to 44, 23.6% from 45 to 64, and 13.1% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 98.3 males. For every 100 females age 18 and over, there were 95.8 males.
The median income for a household in the town was $43,516, and the median income for a family was $48,375. Males had a median income of $35,217 versus $24,293 for females. The per capita income for the town was $18,049. About 4.5% of families and 6.8% of the population were below the poverty line, including 7.3% of those under age 18 and 7.4% of those age 65 or over.
Communities and locations in the Town of Royalton
- Dysinger – A hamlet on Route 93.
- Gasport – A hamlet on the Erie Canal and Route 31 (Rochester Road).
- Gilberts Corners – A hamlet on Route 77.
- Leslie – A hamlet on Tonawanda Creek Road and Rapids Road.
- McNalls Corners – A hamlet on NY-77 west of Royalton Center.
- Middleport – The Village of Middleport is in the northeast corner of the town.
- Orangeport – A hamlet on the Erie Canal and west of Gasport on NY-31.
- Reynales Basin – A location on the Erie Canal east of Gasport.
- Royalton Airport (9G5) – A small general aviation airport south of Gasport.
- Royalton Center – A hamlet on NY-77 (Chesnut Ridge Road) and Royalton Center Road. The community was originally called "Carringtons Corners."
- Royalton Ravine County Park – A park south of Gasport.
- Terrys Corners – A small hamlet on NY-77 (Chesnut Ridge Road) near the western town line.
- Tonawanda Wildlife Management Area – Part of this conservation area is in the southeast part of the town.
- Tonawanda Reservation – An uninhabited part of the reservation is in the town,
- Wolcottsville – A hamlet in the southeast part of the town