|Area||0.46 sq mi (1 km2)|
|- land||0.46 sq mi (1 km2)|
|- water||0.00 sq mi (0 km2)|
|Density||450.0 / sq mi (174 / km2)|
|- summer (DST)||CDT (UTC-5)|
|Wikimedia Commons: Smithfield, Illinois|
Smithfield is located at (40.473086, -90.292639).
According to the 2010 census, the village has a total area of 0.46 square miles (1.2 km2), all land.
As of the census of 2000, there were 214 people, 95 households, and 66 families residing in the village. The population density was 450.0 people per square mile (172.1/km²). There were 103 housing units at an average density of 216.6 per square mile (82.9/km²). The racial makeup of the village was 99.53% White, and 0.47% from two or more races.
There were 95 households out of which 24.2% had children under the age of 18 living with them, 60.0% were married couples living together, 5.3% had a female householder with no husband present, and 30.5% were non-families. 29.5% of all households were made up of individuals and 16.8% had someone living alone who was 65 years of age or older. The average household size was 2.25 and the average family size was 2.74.
In the village the population was spread out with 19.6% under the age of 18, 5.6% from 18 to 24, 29.9% from 25 to 44, 29.9% from 45 to 64, and 15.0% who were 65 years of age or older. The median age was 42 years. For every 100 females there were 96.3 males. For every 100 females age 18 and over, there were 87.0 males.
The median income for a household in the village was $32,031, and the median income for a family was $43,125. Males had a median income of $37,857 versus $25,938 for females. The per capita income for the village was $16,661. About 3.3% of families and 3.8% of the population were below the poverty line, including none of those under the age of eighteen and 5.3% of those sixty five or over.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "2010 Census U.S. Gazetteer Files for Places – Illinois". United States Census. Retrieved 2012-10-13.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.