Riga is a town in Monroe County, New York. The population was 5,590 at the 2010 census.
According to the United States Census Bureau, the town has a total area of 35.3 square miles (91 km), of which, 35.2 square miles (91 km) of it is land and 0.1 square miles (0.26 km) of it (0.37%) is water.
Riga is bordered on the north by the town of Ogden, on the east by the town of Chili, on the west by Genesee County, and on the south by Genesee County and the town of Wheatland. Interstate 490 crosses the town.
As of the census of 2000, there were 5,437 people, 1,969 households, and 1,518 families residing in the town. The population density was 154.6 people per square mile (59.7/km²). There were 2,018 housing units at an average density of 57.4 per square mile (22.2/km²). The racial makeup of the town was 97.26% White, 0.72% African American, 0.15% Native American, 0.74% Asian, 0.04% Pacific Islander, 0.09% from other races, and 1.01% from two or more races. Hispanic or Latino of any race were 0.92% of the population.
There were 1,969 households out of which 39.1% had children under the age of 18 living with them, 64.9% were married couples living together, 9.1% had a female householder with no husband present, and 22.9% were non-families. 18.6% of all households were made up of individuals and 7.6% had someone living alone who was 65 years of age or older. The average household size was 2.75 and the average family size was 3.15.
In the town, the population was spread out with 28.3% under the age of 18, 6.1% from 18 to 24, 30.5% from 25 to 44, 25.6% from 45 to 64, and 9.6% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 99.2 males. For every 100 females age 18 and over, there were 93.5 males.
The median income for a household in the town was $58,842, and the median income for a family was $65,106. Males had a median income of $47,083 versus $31,202 for females. The per capita income for the town was $23,590. About 3.3% of families and 3.8% of the population were below the poverty line, including 2.3% of those under age 18 and 10.7% of those age 65 or over.