Martinsville is a city in Clark County, Illinois, United States. The population was 1,118 at the 2020 census.
Geography
thumb|left|Linn Park, featuring the world's largest anvil. The Martinsville Library is in the background.
According to the 2021 census gazetteer files, Martinsville has a total area of , of which (or 98.63%) is land and (or 1.37%) is water.
Demographics
2020 census
As of the 2020 census, Martinsville had a population of 1,118. The median age was 38.0 years. 26.2% of residents were under the age of 18 and 16.6% of residents were 65 years of age or older. For every 100 females there were 87.6 males, and for every 100 females age 18 and over there were 85.4 males age 18 and over.
0.0% of residents lived in urban areas, while 100.0% lived in rural areas.
There were 472 households in Martinsville, of which 30.3% had children under the age of 18 living in them. Of all households, 41.5% were married-couple households, 16.5% were households with a male householder and no spouse or partner present, and 31.6% were households with a female householder and no spouse or partner present. About 32.8% of all households were made up of individuals and 18.0% had someone living alone who was 65 years of age or older.
{| class="wikitable"
|+ Racial composition as of the 2020 census