Welcome to Jefferson County ...
Time Zone: Jefferson County lies in the Central Time Zone (CST/CDT) and observes daylight saving time.
The community of Hillsboro is the Seat for Jefferson County.
Jefferson County was founded in 1818. Jefferson was created by taking area from Saint Louis and Sainte Genevieve Counties.
From the Census Estimates for 2019, <1> Jefferson had a population of 225,081 people. This is an increase of 2.72% since the last Census (which gave a population of 219,128 people in 2010).
At the time of the 2010 Census, Jefferson represented 3.66% of the total population of Missouri.
Below are some of the communities located in Jefferson County:
- Arnold
(12 miles [19.3 km] to the northeast)
- Arnold is located in Jefferson County (MO)
- Jump to our Gazetteer entry for Arnold
- Population from the 2020 Census: 21,145 people
- Jump to TripAdvisor's Tourism page for Arnold <2>
- Byrnes Mill
(11 miles [17.7 km] to the north)
- Cedar Hill Lakes
(9 miles [14.5 km] to the west)
- Cedar Hill Lakes is located in Jefferson County (MO)
- Jump to our Gazetteer entry for Cedar Hill Lakes
- Population from the 2020 Census: 227 people
- Crystal City
(7 miles [11.3 km] to the southeast)
- De Soto
(10 miles [16.1 km] to the south)
- Festus
(7 miles [11.3 km] to the southeast)
- Festus is located in Jefferson County (MO)
- Jump to our Gazetteer entry for Festus
- Population from the 2020 Census: 12,114 people
- Jump to TripAdvisor's Tourism page for Festus <2>
- Herculaneum
(6 miles [9.7 km] to the east)
- Hillsboro
(4 miles [6.4 km] to the southwest)
- Continue List (7 more) ...
- Kimmswick
(9 miles [14.5 km] to the northeast)
- Lake Tekakwitha
(15 miles [24.1 km] to the northwest)
- Lake Tekakwitha is located in Jefferson County (MO)
- Jump to our Gazetteer entry for Lake Tekakwitha
- Population from the 2020 Census: 260 people
- Olympian Village
(10 miles [16.1 km] to the south)
- Olympian Village is located in Jefferson County (MO)
- Jump to our Gazetteer entry for Olympian Village
- Population from the 2020 Census: 752 people
- Parkdale
(13 miles [20.9 km] to the north)
- Parkdale is located in Jefferson County (MO)
- Jump to our Gazetteer entry for Parkdale
- Population from the 2020 Census: 162 people
- Peaceful Village
(12 miles [19.3 km] to the north)
- Peaceful Village is located in Jefferson County (MO)
- Jump to our Gazetteer entry for Peaceful Village
- Population from the 2020 Census: 67 people
- Pevely
(5 miles [8 km] to the east)
- Pevely is located in Jefferson County (MO)
- Jump to our Gazetteer entry for Pevely
- Population from the 2020 Census: 6,001 people
- Jump to TripAdvisor's Tourism page for Pevely <2>
- Scotsdale
(8 miles [12.9 km] to the northwest)
- Scotsdale is located in Jefferson County (MO)
- Jump to our Gazetteer entry for Scotsdale
- Population from the 2020 Census: 216 people
Websites of Interest ...
- Websites specific to Missouri
- Websites specific to Jefferson County
- Websites for nearby counties
- Saint Louis County
- Monroe County
- Sainte Genevieve County
- Saint Francois County
- Washington County
- Franklin County
- Cemetery Information and Directories
Footnotes ...
| <1> | On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2010 Census and the next count will be for the 2020 Census. |
| <2> | While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program. |