Richland County, Illinois

state">U.S. state of Illinois. According to the 2020 United States census, it had a population of 15,813. Its county seat is Olney.^{: County Seats}

Richland County
County
Richland County Courthouse in Olney
Location within the U.S. state of Illinois
Illinois's location within the U.S.
Coordinates: 38°43′N 88°05′W / 38.71°N 88.09°W / 38.71; -88.09
Country	United States
State	Illinois
Founded	February 24, 1841
Named for	Richland County, Ohio
Seat	Olney
Largest city	Olney
Area
• Total	362 sq mi (940 km2)
• Land	356 sq mi (920 km2)
• Water	1.9 sq mi (5 km2)  0.5%
Population  (2020)
• Total	15,813
• Estimate  (2021)	15,796
• Density	44/sq mi (17/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	12th

Richland County was established in 1841 out of portions of East part of Clay and West part of Lawrence counties. It was named for Richland County, Ohio, where many of the early settlers migrated from.^{: Origin of the name of the county}

•  
  Richland County at the time of its creation in 1841

According to the U.S. Census Bureau, the county has a total area of 362 square miles (940 km²), of which 360 square miles (930 km²) is land^{: Population tab, Population Density sub-tab} and 1.9 square miles (4.9 km²) (0.5%) is water.

Climate and weather

In recent years, average temperatures in the county seat of Olney have ranged from a low of 19 °F (−7 °C) in January to a high of 88 °F (31 °C) in July, although a record low of −25 °F (−32 °C) was recorded in February 1951 and a record high of 112 °F (44 °C) was recorded in July 1936. Average monthly precipitation ranged from 2.73 inches (69 mm) in February to 4.76 inches (121 mm) in May.

Transit

• Rides Mass Transit District

Major highways

•   U.S. Route 50
•   Illinois Route 130
•   Illinois Route 250

Adjacent counties

• Jasper County (north)
• Crawford County (northeast)
• Lawrence County (east)
• Wabash County (southeast)
• Edwards County (south)
• Wayne County (southwest)
• Clay County (west)

As of the 2010 United States Census, there were 16,233 people, 6,726 households, and 4,438 families residing in the county. By 2020, the population had decreased to 15,813 people.^{: Population tab, Population Density sub-tab} The 2010 population density was 45.1 inhabitants per square mile (17.4/km²), which decreased to 43.1 inhabitants per square mile (16.6/km²) in the 2020 census.^{: Population tab, Population Density sub-tab} In 2010, there were 7,513 housing units, compared to 7,364 in 2020,^{: Housing tab, Occupied Units sub-tab} at an average density of 20.9 per square mile (8.1/km²). The 2010 racial makeup of the county was 97.3% white (94.2%, 2020 ), 0.7% Asian (0.8%, 2020 ), 0.5% black or African American (same, 2020), 0.2% American Indian (same, 2020), 0.4% (0.5%, 2020 ) from other races, and 0.9% from two or more races (3.7%, 2020 ).^{: for 2020—Race alone tab, all sub-tabs} Those of Hispanic or Latino origin made up 1.3% (1.7%, 2020 ) of the population.^{: Hispanic Origin tab, Hispanic or Latino sub-tab} In terms of ancestry, 29.6% were German, 11.7% were American, 11.4% were English, and 9.2% were Irish.

Of the 6,726 households, 28.9% had children under the age of 18 living with them, 51.7% were married couples living together, 9.6% had a female householder with no husband present, 34.0% were non-families, and 29.3% of all households were made up of individuals. The average household size was 2.36 and the average family size was 2.88. The median age was 42.1 years.

The median income for a household in the county was $41,917 and the median income for a family was $53,853. Males had a median income of $41,058 versus $31,296 for females. The per capita income for the county was $22,874. About 9.5% of families and 13.8% of the population were below the poverty line, including 15.1% of those under age 18 and 11.9% of those age 65 or over. Richland is the top ranked most affordable county in Illinois to buy a car and is on average $932 less expensive than other Illinois counties.

City

• Olney (seat)

Villages

• Calhoun
• Claremont
• Noble
• Parkersburg

Unincorporated communities

• Berryville
• Dundas
• Elbow
• Wynoose

Townships

Richland County is divided into nine townships:^{: Township Names}

• Alexander W. Swanitz (1851–1915), civil engineer who participated in the construction of railroads in various parts of the country
• Dial D. Ryder (1938–2011), gun smith

• National Register of Historic Places listings in Richland County

38°43′N 88°05′W / 38.71°N 88.09°W / 38.71; -88.09