Shelbyville is located at 39°24′29″N 88°47′59″W (39.408142, -88.799730).

According to the United States Census Bureau, the city has a total area of 3.9 square miles (10 km2), of which, 3.7 square miles (9.6 km2) of it is land and 0.2 square miles (0.52 km2) of it (4.90%) is water.

As of the census of 2010, there were 4,700 people, 2,093 households, and 1,345 families residing in the city of Shelbyville.

Property Income

• The median income for a household in the city was $32,458
  
• The median income for a family was $39,205
• Males had a median income of $31,477 versus $18,710 for females.
• The per capita income for the city was $17,596.

About 6.2% of families and 9.9% of the population were below the poverty line, including 10.2% of those under age 18 and 13.8% of those age 65 or over.

Racial Makeup

• 98.26% White
• 0.34% African American
• 0.26% Native American
• 0.32% Asian
• 0.06% Pacific Islander
• 0.28% from other races
• 0.49% from two or more races.

Hispanic or Latino of any race were 1.34% of the population.

There were 2,093 households out of which:

• 27.6% had children under the age of 18 living with them,
• 49.6% were married couples living together
• 9.6% had a female householder with no husband present
• 36.9% were non-families.
• 33.1% of all households were made up of individuals
• 16.9% had someone living alone who was 65 years of age or older.

The average household size was 2.28 and the average family size was 2.89.

In the city the population was spread out with:

• Population density: 1205.13 people per square mile (3121.27/km²).
  
• There were 2,308 housing units at an average density of 619.9 per square mile (239.1/km²)

 

• 23.0% under the age of 18
• 8.3% from 18 to 24, 25.3% from 25 to 44
• 21.5% from 45 to 64
• 21.9% who were 65 years of age or older.
• The median age was 40 years.
• For every 100 females there were 91.2 males.