Martinsville was platted in 1816. By 1833, Martinsville had 75 inhabitants. In 2013, prosecutors charged a former Martinsville council president and a village administrator with stealing more than $100,000 from the village.
As of the census of 2010, there were 463 people, 149 households, and 118 families living in the village. The population density was. There were 166 housing units at an average density of. The racial makeup of the village was 96.1% White, 1.3% African American, 0.2% Asian, and 2.4% from other races. Hispanic or Latino of any race were 2.8% of the population. There were 149 households of which 44.3% had children under the age of 18 living with them, 52.3% were married couplesliving together, 16.8% had a female householder with no husband present, 10.1% had a male householder with no wife present, and 20.8% were non-families. 15.4% of all households were made up of individuals and 6.7% had someone living alone who was 65 years of age or older. The average household size was 3.11 and the average family size was 3.34. The median age in the village was 32.8 years. 32.4% of residents were under the age of 18; 8.5% were between the ages of 18 and 24; 24.8% were from 25 to 44; 22.3% were from 45 to 64; and 12.1% were 65 years of age or older. The gender makeup of the village was 49.7% male and 50.3% female.
2000 census
As of the census of 2000, there were 440 people, 160 households, and 127 families living in the village. The population density was 996.4 people per square mile. There were 169 housing units at an average density of 382.7 per square mile. The racial makeup of the village was 96.36% White, 0.91% African American, 0.45% Native American, 0.23% Asian, 0.45% from other races, and 1.59% from two or more races. Hispanic or Latino of any race were 0.23% of the population. There were 160 households out of which 33.8% had children under the age of 18 living with them, 59.4% were married couples living together, 11.9% had a female householder with no husband present, and 20.6% were non-families. 17.5% of all households were made up of individuals and 9.4% 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 3.06. In the village, the population was spread out with 27.5% under the age of 18, 10.0% from 18 to 24, 28.9% from 25 to 44, 24.3% from 45 to 64, and 9.3% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 97.3 males. For every 100 females age 18 and over, there were 96.9 males. The median income for a household in the village was $36,000, and the median income for a family was $38,750. Males had a median income of $26,406 versus $20,000 for females. The per capita income for the village was $13,288. About 9.4% of families and 8.5% of the population were below the poverty line, including 7.6% of those under age 18 and 21.3% of those age 65 or over.
