Jefferson County
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- Population
- 229,458
- Area
- 656.26 sq mi (1,699.71 km²), 7.83 sq mi water
- Median age
- 40.3
- Households
- 88,309
- Persons per household
- 2.6
- Median household income
- $82,851
- Median house value
- $237,200
Demographics: 2020–2024 ACS
This Afternoon
82°F
Slight Chance Showers And Thunderstorms19% precip
Tonight
64°F
Slight Chance Showers And Thunderstorms then Patchy Fog20% precip
Saturday
91°F
Patchy Fog then Mostly Sunny7% precip
Saturday Night
65°F
Partly Cloudy10% precip
Cities & Towns in Jefferson County
ArnoldBarnhartBriarwood EstatesByrnes MillCedar HillCedar Hill LakesCrystal CityDe SotoEurekaFestusHerculaneumHigh RidgeHillsboroHorineImperialKimmswickLaBarque CreekLake TekakwithaMurphyOlympian VillageParkdalePeaceful VillagePevelyRaintree PlantationScotsdaleSummer SetUnincorporated Jefferson County