The Village of Kaser is on Route 306.
According to the United States Census Bureau, the village has a total area of 0.2 square mile (0.4 km²), all land.
As of 2010 census, 99.5% of population was White.
As of the 2000 Census, there were 3,314 people, 1647 households, and 1617 families residing in the village. The population density was 19,342.6 people per square mile (7,531.3/km²). There were 678 housing units at an average density of 3,954.9 per square mile (1,539.9/km²). The racial makeup of the village was 98.61% White, 0.24% African American, 0.45% Asian, 0.03% Pacific Islander, and 0.66% from two or more races. Hispanic or Latino of any race were 0.54% of the population.
There were 1647 households out of which 79.1% had children under the age of 18 living with them, 90.9% were married couples living together, 3.7% were female households with no husband present, and 4.5% were non-families. 3.2% of all households were individuals and 1.9% had someone living alone who was 65 years of age or older. The average household size was 4.89 and the average family size was 5.04.
In the village, the population was spread out with 53.4% under the age of 18, 18.2% from 18 to 24, 16.8% from 25 to 44, 6.2% from 45 to 64, and 5.4% who were 65 years of age or older. The median age was 16 years. For every 100 females, there were 99.4 males. For every 100 females age 18 and over, there were 93.7 males. The median income for a household in the village was $13,125, and the median income for a family was $13,191. Males had a median income of $20,500 versus $19,792 for females. The per capita income for the village was $5,147. About 65.0% of families and 66.4% of the population were below the poverty threshold, including 68.9% of those under age 18 and 43.4% of those age 65 or over. The village population grew by 43% from 2000 to 2010.