Looking east in downtown Monticello
|• Total||6.33 sq mi (16.39 km2)|
|• Land||6.29 sq mi (16.29 km2)|
|• Water||0.04 sq mi (0.10 km2)|
|Elevation||823 ft (251 m)|
| • Estimate |
|• Density||600/sq mi (230/km2)|
|Time zone||UTC-6 (Central (CST))|
|• Summer (DST)||UTC-5 (CDT)|
Monticello is located at  According to the United States Census Bureau, the city has a total area of 6.33 square miles (16.39 km2), of which 6.29 square miles (16.29 km2) is land and 0.04 square miles (0.10 km2) is water.. Monticello is 823 feet above sea level.(42.238759, -91.189067).
For many years, U.S. Route 151 passed directly through Monticello. In 2004, a four-lane bypass around Monticello was completed and opened. As a result, the highway was moved approximately one mile east of the previous route.
|Source:"U.S. Census website". United States Census Bureau. Retrieved 2020-03-29. and Iowa Data Center|
As of the census of 2010, there were 3,796 people, 1,693 households, and 991 families living in the city. The population density was 603.5 inhabitants per square mile (233.0/km2). There were 1,839 housing units at an average density of 292.4 per square mile (112.9/km2). The racial makeup of the city was 98.6% White, 0.3% African American, 0.3% Asian, 0.3% from other races, and 0.5% from two or more races. Hispanic or Latino of any race were 1.3% of the population.
There were 1,693 households of which 25.8% had children under the age of 18 living with them, 46.5% were married couples living together, 8.6% had a female householder with no husband present, 3.4% had a male householder with no wife present, and 41.5% were non-families. 35.6% of all households were made up of individuals and 18.1% had someone living alone who was 65 years of age or older. The average household size was 2.18 and the average family size was 2.82.
The median age in the city was 43.3 years. 22.3% of residents were under the age of 18; 6.9% were between the ages of 18 and 24; 22.8% were from 25 to 44; 26.3% were from 45 to 64; and 21.8% were 65 years of age or older. The gender makeup of the city was 47.5% male and 52.5% female.
As of the census of 2000, there were 3,607 people, 1,538 households, and 979 families living in the city. The population density was 980.8 people per square mile (378.4/km²). There were 1,637 housing units at an average density of 445.1 per square mile (171.8/km²). The racial makeup of the city was 98.75% White, 0.19% African American, 0.08% Native American, 0.14% Asian, 0.17% from other races, and 0.67% from two or more races. Hispanic or Latino of any race were 1.16% of the population.
There were 1,538 households out of which 26.9% had children under the age of 18 living with them, 51.4% were married couples living together, 9.4% had a female householder with no husband present, and 36.3% were non-families. 31.5% of all households were made up of individuals and 17.4% had someone living alone who was 65 years of age or older. The average household size was 2.26 and the average family size was 2.82.
Population spread: 23.1% under the age of 18, 7.3% from 18 to 24, 24.5% from 25 to 44, 21.3% from 45 to 64, and 23.8% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 85.0 males. For every 100 females age 18 and over, there were 82.2 males.
The median income for a household in the city was $34,932, and the median income for a family was $42,616. Males had a median income of $30,324 versus $20,998 for females. The per capita income for the city was $16,699. About 3.6% of families and 7.2% of the population were below the poverty line, including 5.8% of those under age 18 and 6.7% of those age 65 or over.
- Samuel Charles Black (1869–1921), Fifth president of Washington & Jefferson College
- Colleen Conway-Welch (1944–2018), Dean of Nursing at Vanderbilt University School
- Roy Crabb (1890–1940), Major League Baseball pitcher
- Mike Dirks, All-American and All-Western Athletic Conference Football Player at University of Wyoming and Philadelphia Eagles
- Ellen Dolan, television actress, most notably in Guiding Light and As the World Turns
- Sewall S. Farwell (1834–1909), Civil War Veteran, Congressman
- Charles W. Gurney (1840–1913), Lieutenant Colonel during the American Civil War and founder of Gurney's Seed and Nursery Company
- Alva L. Hager (1850–1923), Congressman
- Donald Knapp, Iowa State Representative
- Roger McMurrin, Conductor of Kiev Symphony
- Kraig Paulsen, Iowa State Representative
- Cornelia Marvin Pierce (1873–1957), Librarian
- Bob Reade, 1998 inductee into the College Football Hall of Fame
- Walter Rice (1866–1930), a Denver architect born and raised in Monticello
- Grace Sandhouse (1896–1940), Entomologist
- Charles Henry Sloan (1863–1946), former Nebraska politician
- Ray Zirkelbach, Iowa State Representative
- "US Gazetteer files 2010". United States Census Bureau. Archived from the original on 2012-07-14. Retrieved 2012-05-11.
- "U.S. Census website". United States Census Bureau. Retrieved 2012-05-11.
- "Population and Housing Unit Estimates". Retrieved November 2, 2019.
- "2010 City Population and Housing Occupancy Status". U.S. Census Bureau. Retrieved March 6, 2011.[dead link]
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "Census of Population and Housing". Census.gov. Retrieved June 4, 2015.
- "U.S. Census website". United States Census Bureau. Retrieved 2008-01-31.
- "Samuel Charles Black (1919–1921)". CONTENTdm. Retrieved March 11, 2011.
- Julian S. Midgorden; James L. Salvador (January 5, 1984). "National Register of Historic Places Inventory/Nomination: Eppich Apartments". National Park Service. Retrieved June 29, 2018.
- Marilyn Bailey Ogilvie; Joy Dorothy Harvey (2000). The Biographical Dictionary of Women in Science: L-Z. Taylor & Francis. p. 1148. ISBN 978-0-415-92040-7. Retrieved 6 March 2012.
- History of Jones County, Iowa, past and present - Vol 1; R.M. Corbit; S. J. Clarke Publishing; 1910 (update of 1871 issue).
- History of Jones County, Iowa, past and present - Vol 2; R.M. Corbit; S. J. Clarke Publishing; 1871.
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