What is the population of Jefferson?

The population of Jefferson, SD is 1,159.

Where is Jefferson located?

Jefferson, SD is located at latitude 42.6025000 and longitude -96.5592000. It is in United States.

What is the area of Jefferson?

The area of Jefferson, SD is 1.322134 km².

What is the elevation of Jefferson?

Jefferson, SD has an elevation of 340 meters (1115 feet) above sea level.

What time zone is Jefferson in?

Jefferson, SD is in the America/Chicago time zone.

What state is Jefferson in?

Jefferson is in the state of South Dakota, United States.

What county is Jefferson, SD in?

Jefferson is in Union County, South Dakota.

How has the population of Jefferson changed?

The population of Jefferson, SD has increased from 943 (2010) to 1,159 (2020), a change of 22.9%.

Jefferson, South Dakota

Jefferson: city in South Dakota, United States

About

Jefferson is a city located in the county of Union in the U.S. state of South Dakota. Its population at the 2010 census was 943 and a population density of 713 people per km². After 10 years in 2020 city had an estimated population of 1,159 inhabitants.

Jefferson locator map — Location of Jefferson on South Dakota map.

Quick Facts about Jefferson

Population	1,159 (2020)
Country	United States of America
State	South Dakota (United States)
County	Union County
Postal code	57038
Phone Area Codes	605
Area	1.32 km²
Latitude & Longitude	42.6025,-96.5592
Altitude	1,115 feet / 340 meters
Time Zone	Central Time Zone
Local time	00:47:06 (23rd April 2026)
Density	877 Pop. per km² as of 2020
Population growth	18.64% (2010-2020)
Weather	80℉ Chance Rain Showers 7-days weather

Union County South Dakota Incorporated and Unincorporated areas Jefferson Highlighted locator map image

Geography

Jefferson is located at 42°36'9"N 96°33'33"W (42.6025000, -96.5592000).

Jefferson map

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Weather

80°F

Chance Rain Showers

25 mph SSW Thursday

A chance of rain showers. Partly sunny, with a high near 80. Chance of precipitation is 40%.

7-Day Forecast

Demographics

The population of Jefferson increased by 18.64% in 10 years.

Year	Population	% Change	Method
2010	943	-	census
2011	968	2.58%	estimation process
2012	988	2.02%	estimation process
2013	997	0.9%	estimation process
2014	1,017	1.97%	estimation process
2015	1,012	-0.49%	estimation process
2016	1,036	2.32%	estimation process
2017	1,057	1.99%	estimation process
2018	1,090	3.03%	estimation process
2019	1,126	3.2%	estimation process
2020	1,159	2.85%	estimation process

Jefferson zip code is 57038. County name: Union, County fips: 46127

Adelescat, Dzhefferson, Джефферсон

People born in Jefferson (2)

People born in Jefferson, including football player Dave Bernard, baseball player Jug Thesenga, .

More notable people

Nearby Schools and Colleges

Schools and campuses linked to Jefferson, SD. Select a name to open its map and contact details.

Code	Name	City	ZIP
152992	Briar Cliff University	Sioux City (IA)	51104
154262	St Luke's College	Sioux City (IA)	51104-0263
154004	Morningside College	Sioux City (IA)	51106-1751
154572	Western Iowa Tech Community College	Sioux City (IA)	51102-5199
154457	Iowa School of Beauty-Sioux City	Sioux City (IA)	51106

Nearby Post Offices

Closest post offices linked to Jefferson.

Post Office Name	City	ZIP
Jefferson Post Office	Jefferson (SD)	57038

Other places with the same name (18)

Jefferson, New Jersey township in Morris County, New Jersey with a population of 20,611 people.
Jefferson, Georgia city in Jackson County, Georgia, United States with a population of 12,490 people.
Jefferson, Iowa city in Greene County, Iowa with a population of 4,075 people.
Jefferson, Oregon city in Marion County, Texas, USA with a population of 3,386 people.
Jefferson, Michigan city in Jackson County, Georgia, United States with a population of 2,998 people.
Jefferson, Indiana unincorporated community in Clinton County, Indiana with a population of 2,523 people.
Jefferson, Maine town in Maine, United States with a population of 2,470 people.
Jefferson, Texas city in Marion County, Texas, USA with a population of 1,924 people.
Jefferson, Ohio county in Ohio, United States with a population of 1,821 people.
Jefferson, North Carolina town in North Carolina, USA with a population of 1,534 people.
Jefferson, New York town in New York, United States with a population of 1,455 people.
Jefferson, Wisconsin city in and county seat of Jefferson County, Wisconsin with a population of 1,225 people.
Jefferson, New Hampshire town in New Hampshire, United States with a population of 1,049 people.
Jefferson, Pennsylvania city in Greene County, Iowa with a population of 729 people.
Jefferson, South Carolina town in South Carolina, United States with a population of 704 people.
Jefferson, Minnesota unincorporated community in Houston County, Minnesota with a population of 127 people.
Jefferson, Kansas unincorporated community in Kansas, United States with a population of 95 people.
Jefferson, Oklahoma town in Oklahoma, United States with a population of 8 people.

Other cities in Union County

Cities, towns, neighborhoods & other populated places in Union County , SD.

City Name	Population	Title
North Sioux City	2,928	City in Union County South Dakota, United States
Dakota Dunes	2,540	Township in Union County, South Dakota
Beresford	1,609	City in South Dakota, United States of America
Big Springs	338	Township in Union County, South Dakota
Alcester	327	Township in Union County, South Dakota
Elk Point	322	City in South Dakota, United States of America
Spink	267	Unincorporated community in South Dakota, United States
Emmet	262	Township in South Dakota, United States
Richland	159	Unincorporated community in South Dakota

Distance to Other Cities

Jefferson distances to largest South Dakota cities