McArthur is located at . It is located at the junction of U.S. Route 50 and Ohio State Route 93. According to the United States Census Bureau, the village has a total area of, of which is land and is water.
As of the census of 2010, there were 1,701 people, 700 households, and 451 families living in the village. The population density was. There were 771 housing units at an average density of. The racial makeup of the village was 98.1% White, 0.1% African American, 0.8% Native American, 0.3% from other races, and 0.8% from two or more races. Hispanic or Latino of any race were 0.8% of the population. There were 700 households of which 34.7% had children under the age of 18 living with them, 38.4% were married couples living together, 19.6% had a female householder with no husband present, 6.4% had a male householder with no wife present, and 35.6% were non-families. 31.9% of all households were made up of individuals and 14.5% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 2.97. The median age in the village was 35.3 years. 27.5% of residents were under the age of 18; 10.2% were between the ages of 18 and 24; 23.6% were from 25 to 44; 23.3% were from 45 to 64; and 15.3% were 65 years of age or older. The gender makeup of the village was 45.7% male and 54.3% female.
2000 census
As of the census of 2000, there were 1,888 people, 777 households, and 512 families living in the village. The population density was 1,416.2 people per square mile. There were 845 housing units at an average density of 633.8 per square mile. The racial makeup of the village was 98.15% White, 0.11% African American, 0.26% Native American, and 1.48% from two or more races. Hispanic or Latino of any race were 0.42% of the population. There were 777 households out of which 35.1% had children under the age of 18 living with them, 45.0% were married couples living together, 15.4% had a female householder with no husband present, and 34.1% were non-families. 31.8% of all households were made up of individuals and 15.7% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 3.04. In the village, the population was spread out with 30.1% under the age of 18, 9.2% from 18 to 24, 26.4% from 25 to 44, 19.6% from 45 to 64, and 14.7% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 83.3 males. For every 100 females age 18 and over, there were 75.4 males. The median income for a household in the village was $25,393, and the median income for a family was $33,026. Males had a median income of $30,109 versus $21,354 for females. The per capita income for the village was $14,623. About 24.7% of families and 27.8% of the population were below the poverty line, including 39.9% of those under age 18 and 14.8% of those age 65 or over.
