Oriska is a city in Barnes County, North Dakota, United States. The population was 118 at the 2010 census.
Oriska was originally called Fourth Siding, and under the latter name was founded in 1872 when the railroad was extended to that point. The name Oriska was adopted in 1881. Oriska was named for a Native American character in a poem by Lydia Sigourney. A post office called Oriska has been in operation since 1881.
Oriska is located at 46°55′53″N 97°47′21″W (46.931346, -97.789105).
According to the United States Census Bureau, the city has a total area of 0.28 square miles (0.73 km2), all of it land.
As of the census of 2010, there were 118 people, 48 households, and 32 families living in the city. The population density was 421.4 inhabitants per square mile (162.7/km2). There were 63 housing units at an average density of 225.0 per square mile (86.9/km2). The racial makeup of the city was 94.9% White, 4.2% from other races, and 0.8% from two or more races. Hispanic or Latino of any race were 4.2% of the population.
There were 48 households of which 31.3% had children under the age of 18 living with them, 58.3% were married couples living together, 6.3% had a female householder with no husband present, 2.1% had a male householder with no wife present, and 33.3% were non-families.