Jefferson County, Missouri

229,458 people. The median home is worth $237,200 (typical Missouri town: $153,900) and the median household earns $82,851.

Towns in Jefferson County

Town	People	Median home	Income	Median age
Arnold	20,858	$220,000	$78,370	39.7
Festus	12,706	$223,600	$73,532	36.7
Murphy	8,425	$184,700	$72,233	39.2
De Soto	6,449	$160,700	$52,500	31.2
Pevely	6,026	$219,600	$56,000	33.2
Barnhart	5,832	$229,200	$95,811	35.8
Crystal City	4,740	$185,800	$72,598	43.7
Herculaneum	4,672	$234,300	$93,438	40.4
Imperial	4,407	$228,700	$90,028	36.3
High Ridge	4,242	$172,200	$70,917	51.1
Hillsboro	3,473	$221,200	$77,500	30.8
Byrnes Mill	3,173	$306,200	$98,576	37.9

49,458 jobs in 2024, average pay $49,615 a year.

BLS QCEW 2024.

BLS LAUS via USDA ERS, annual averages.

NOAA recorded 664 storm events in Jefferson County from 1996 to 2026, with 10 deaths.

NOAA NCEI Storm Events Database.

Jefferson County has been included in 30 FEMA declarations since 1953.

Declared	Incident	Declaration
May 21, 2025	Severe Storm	DR-4867: Severe Storms, Straight-Line Winds, Tornadoes, And Wildfires
March 26, 2020	Biological	DR-4490: Covid-19 Pandemic
March 13, 2020	Biological	EM-3482: Covid-19
July 9, 2019	Severe Storm	DR-4451: Severe Storms, Tornadoes, And Flooding
June 2, 2017	Flood	DR-4317: Severe Storms, Tornadoes, Straight-Line Winds And Flooding
January 21, 2016	Flood	DR-4250: Severe Storms, Tornadoes, Straight-Line Winds, And Flooding

Sources: U.S. Census Bureau ACS 2020–2024; BLS QCEW and LAUS; NOAA Storm Events; FEMA OpenFEMA (not endorsed by FEMA).