Monticello, Missouri Demographics & Population 2026

A note before these figures: with a population of 233, Monticello's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Monticello is a small community located in Missouri, within Lewis County. The total population is 233. It ranks as the 698th most populous out of 1,062 Census-designated places in Missouri.

Age Demographics

The median age in Monticello is 31.1 years. This is 20% lower than the state median of 39.0 years.

Economy, Income & Housing

The median household income in Monticello is $93,125. This is 32% higher than the state median of $70,702. It is also 15% higher than the national median of $80,734. The poverty rate stands at 14.7%. This is 17% higher than the state poverty rate of 12.6%. The survey records no unemployed residents in Monticello, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $112,500. Housing costs are 51% lower than the state median of $230,300. With a home-value-to-income ratio of just 1.2x, Monticello is one of the most affordable housing markets in the area. 72.7% of occupied housing units are owner-occupied. This homeownership rate is 7% higher than the state average of 68.1%.

Race & Ethnicity

The largest racial or ethnic group in Monticello is White (non-Hispanic), making up 84.5% of the population. Black or African American residents account for 5.1%. The Black or African American population (5.1%) is well below the state average of 10.9%. The Hispanic or Latino population (0.4%) is well below the state average of 5.2%.

Education

21.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 34% lower than the state rate of 32.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 89.7%.

Data Sources & Methodology

All demographic data for Monticello, Missouri is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Missouri state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,062 Census-designated places in Missouri. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.