City · Missouri
Herculaneum, Missouri
Herculaneum, city, in Jefferson County, Missouri. Herculaneum had 5,402 residents on July 1, 2025 by the Census Bureau's estimate, up 15.9% since 2020; the 2020 Census counted 4,672 and the ACS 2020-2024 5-year estimates put it at 5,071 (±19). GEOID 2931708.
Residents, July 2025 estimate
5,402
Census Bureau estimate (no margin published)
2020 Census count: 4,672 · ACS 2020-2024: 5,071 ±19
Median household income
$93,438
±$13,888 (90% margin)
Missouri: $70,702
Median home value
$234,300
±$15,267 (90% margin)
Missouri: $230,300
Median gross rent
$1,690
±$931 (90% margin)
Missouri: $1,033
Where is Herculaneum and what county is it in?
Herculaneum is a city in Jefferson County, Missouri. It covers 4.2 square miles of land, 1,124 residents per square mile in 2020.
Herculaneum is in the St. Louis, MO-IL metropolitan statistical area, which takes in 15 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Herculaneum, and is it growing?
The Census Bureau estimates that 5,402 people lived in Herculaneum on July 1, 2025, up 15.9% since 2020, faster than Missouri (+1.9%). The 2020 Census counted 4,672 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 5,071 (±19).
| Measure | Herculaneum | Jefferson County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 5,071 ±19 | 229,458 | +1,046 |
| Households | 1,865 ±220 | 88,309 | +437 |
| Average household size | 2.63 ±0.31 | 2.58 | no clear change |
| Housing units | 2,037 ±247 | 93,955 | +474 |
Herculaneum's population since 2000
From 2,805 in 2000 to 5,402 in 2025: up 92.6%. The 2000, 2010 and 2020 figures are census counts, each for Herculaneum as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Herculaneum?
The median resident of Herculaneum is 40.4 years old; 24.2% are under 18 and 16.1% are 65 or older. The largest group is non-Hispanic white residents at 77.4%, then non-Hispanic residents of two or more races at 10.6%.
| Measure | Herculaneum | Jefferson County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 40.4 ±4.5 | 40.3 | no clear change |
| Under 18 years | 24.2% ±5.9 pts | 22.5% | – |
| 65 years and over | 16.1% ±4.8 pts | 16.7% | – |
| Male | 49.6% ±4.1 pts | 50.0% | – |
| Hispanic or Latino (any race) | 3.9% ±3.6 pts | 2.6% | – |
| White alone, not Hispanic | 77.4% ±11.0 pts | 88.5% | −22.3 pts |
| Black or African American alone, not Hispanic | 7.2% ±6.7 pts | 1.0% | – |
| Asian alone, not Hispanic | 0.3% ±0.4 pts | 1.0% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.2 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.7 pts | 0.0% | – |
| Two or more races, not Hispanic | 10.6% ±8.4 pts | 6.5% | – |
| Some other race alone, not Hispanic | 0.6% ±0.7 pts | 0.3% | – |
| Born outside the United States | 1.3% ±1.3 pts | 2.3% | – |
| Speak a language other than English at home (age 5+) | 1.3% ±1.4 pts | 3.3% | – |
| Civilian veterans (age 18+) | 6.4% ±2.8 pts | 7.3% | – |
| With a disability | 9.5% ±3.6 pts | 13.3% | – |
| No health insurance coverage | 9.7% ±7.1 pts | 6.6% | – |
| High school graduate or higher (age 25+) | 94.2% ±3.4 pts | 92.0% | – |
| Bachelor's degree or higher (age 25+) | 23.0% ±6.1 pts | 24.7% | no clear change |
| Graduate or professional degree (age 25+) | 7.8% ±3.0 pts | 8.0% | – |
| Lived in the same house a year earlier | 90.9% ±4.2 pts | 90.1% | – |
| Moved from another state in the past year | 1.5% ±1.7 pts | 1.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Herculaneum earn?
Half of Herculaneum's 1,865 households earn less than $93,438 a year (±$13,888), against $82,851 in Jefferson County and $70,702 in Missouri. In 2015-2019 it was $80,548 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Herculaneum | Jefferson County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $93,438 ±$13,888 | $82,851 | no clear change |
| Mean household income | $95,595 ±$8,707 | $98,813 | – |
| Per capita income | $36,465 ±$4,500 | $39,160 | no clear change |
| People below the poverty line | 5.6% ±4.4 pts | 9.0% | – |
| Children under 18 below the poverty line | 9.9% ±9.4 pts | 11.6% | – |
| Households receiving SNAP | 4.7% ±5.1 pts | 7.1% | – |
| Households with a computer | 95.1% ±4.4 pts | 95.7% | – |
| Households with a broadband subscription | 94.2% ±3.5 pts | 91.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Herculaneum?
Owners occupy 90.7% of Herculaneum's occupied homes and renters 9.3%. The median owner-occupied home is valued at $234,300 by its owner (±$15,267). The median renter pays $1,690 a month including utilities, and 59.2% of renters pay 35% or more of their income on rent.
| Measure | Herculaneum | Jefferson County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $234,300 ±$15,267 | $237,200 | +$38,866 |
| Median gross rent | $1,690 ±$931 | $979 | no clear change |
| Renters paying 35% or more of income on rent | 59.2% ±34.1 pts | 29.7% | no clear change |
| Median monthly owner costs, with a mortgage | $1,534 ±$129 | $1,545 | – |
| Owner-occupied homes | 90.7% ±5.4 pts | 82.2% | +8.8 pts |
| Renter-occupied homes | 9.3% ±5.4 pts | 17.8% | – |
| Housing units | 2,037 ±247 | 93,955 | +474 |
| Homeowner vacancy rate | 2.9% ±4.4 pts | 1.0% | – |
| Rental vacancy rate | 0.0% ±18.1 pts | 1.8% | – |
| Single-family detached homes | 89.4% ±6.0 pts | 79.9% | – |
| Mobile homes | 0.0% ±1.7 pts | 9.0% | – |
| Built 2020 or later | 3.3% ±2.5 pts | 2.2% | – |
| Built 2010 to 2019 | 24.8% ±7.1 pts | 9.2% | – |
| Built 1939 or earlier | 4.4% ±2.5 pts | 3.5% | – |
| Households with no vehicle | 5.8% ±4.2 pts | 3.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Herculaneum building?
Builders took permits for 30 new housing units in Herculaneum in 2025 (30 in single-family houses), 5.6 per 1,000 residents against 2.8 across Missouri.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Herculaneum work and get to work?
75.1% of Herculaneum's workers drive alone and 13.3% work from home. The average trip to work takes 29.3 minutes.
| Measure | Herculaneum | Jefferson County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 69.6% ±6.1 pts | 66.0% | – |
| Unemployment rate | 1.2% ±1.4 pts | 3.2% | – |
| Drove alone to work | 75.1% ±9.2 pts | 79.5% | – |
| Carpooled | 8.9% ±5.0 pts | 7.2% | – |
| Public transportation | 0.0% ±1.3 pts | 0.1% | – |
| Walked | 1.3% ±1.6 pts | 0.6% | – |
| Worked from home | 13.3% ±7.3 pts | 11.5% | – |
| Mean travel time to work | 29.3 min ±3.3 | 30.6 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Herculaneum?
No census tract lies mostly in Herculaneum; 5 tracts reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 7008.02Jefferson County | 5,775 | $86,318 |
| Tract 7006.07Jefferson County | 2,692 | $86,111 |
| Tract 7006.06Jefferson County | 2,790 | $42,583 |
| Tract 7006.05Jefferson County | 6,744 | $78,568 |
| Tract 7007Jefferson County | 4,453 | $66,172 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Herculaneum) · Census block assignment files
How does Herculaneum compare with other places in Missouri?
By the Census Bureau's July 2025 estimates, Herculaneum is the 4,687th-most populous of the 19,476 U.S. incorporated places that have one and the 129th-most populous of 936 in Missouri.
Herculaneum ranks 59th of 416 places in Missouri with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 129th | 936 |
| Growth 2020-2025 (PEP) | 17th | 394 |
| Residents per square mile | 184th | 420 |
| Median household income | 59th | 416 |
| Per capita income | 111th | 420 |
| Median home value | 90th | 416 |
| Median gross rent | 9th | 398 |
| Bachelor's degree or higher | 163rd | 404 |
| Median age | 148th | 420 |
| Owner-occupied share | 25th | 418 |
| Work from home | 106th | 270 |
| Travel time to work | 54th | 420 |
Herculaneum's figures with every place in Missouri (CSV)
Every place in Missouri, sortable · Compare Herculaneum with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Herculaneum?
22 of the 57 figures for Herculaneum on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Herculaneum are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Herculaneum.