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Roberts County
Roberts County
County
	Roberts County Courthouse
	Location within the U.S. state of South Dakota
	South Dakota's location within the U.S.
	Coordinates: 45°37′N 96°57′W / 45.62°N 96.95°W
Country	United States
State	South Dakota
Founded	March 8, 1883 (organized); August 6, 1883 (organized)
Named for	S. G. Roberts
Seat	Sisseton
Largest city	Sisseton
Area
• Total	1,136 sq mi (2,940 km2)
• Land	1,101 sq mi (2,850 km2)
• Water	35 sq mi (90 km2) 3.1%
Population (2020)
• Total	10,280
• Estimate (2023)	10,206
• Density	9.0/sq mi (3.5/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	At-large
Website	roberts.sdcounties.org

Roberts County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 10,280.^[2] Its county seat is Sisseton.^[3] The county was named either for S. G. Roberts of Fargo, North Dakota, or for Solomon Robar, an early local French fur trader.^[1] It was created on March 8, 1883, and fully organized by August 6 of that year. Its boundary was altered once, in 1885.^[4]

Geography

Roberts County is at South Dakota's northeastern corner. Its eastern boundary abuts Minnesota (across the Bois de Sioux River), and its northern boundary abuts North Dakota. The Cottonwood Slough flows southward, draining the upper portion of the county into the River. The terrain consists of rolling hills, devoted to agriculture.^[5] The terrain slopes to the east; its highest point is on its upper western boundary line, at 2,047 ft (624 m) ASL.^[6]

Roberts County has an area of 1,136 square miles (2,940 km²), of which 1,101 square miles (2,850 km²) is land and 35 square miles (91 km²) (3.1%) is water.^[7] The Traverse Gap is in eastern Roberts County along the Minnesota border. The Lake Traverse Indian Reservation covers most of the county.

Major highways

Transit

Jefferson Lines

Adjacent counties

Protected areas^[5]

Big Stone Island State Nature Area
Crawford State Game Production Area
Knutson State Game Production Area
Harmon State Game Production Area
Hartford Beach State Park
Peever Slough State Game Production Area
Sica Hollow State Park (part)
White Rock State Game Production Area

Lakes and rivers^[5]

Big Stone Lake
Bois de Sioux River
Clubhouse Lake
Cottonwood Lake
Dobberstien Slough
Drywood Lakes
Hurricane Lake
Lake Bdesska
Lake Traverse
Little Minnesota River
Oneroad Lake
Owl Lake
Round Lake
Whetstone River (North fork)
Whitestone Lake

Demographics

Historical population
Census	Pop.	Note	%±
1890	1,997		—
1900	12,216		511.7%
1910	14,897		21.9%
1920	16,514		10.9%
1930	15,782		−4.4%
1940	15,887		0.7%
1950	14,929		−6.0%
1960	13,190		−11.6%
1970	11,678		−11.5%
1980	10,911		−6.6%
1990	9,914		−9.1%
2000	10,016		1.0%
2010	10,149		1.3%
2020	10,280		1.3%
2023 (est.)	10,206	^[8]	−0.7%
U.S. Decennial Census^[9] 1790-1960^[10] 1900-1990^[11] 1990-2000^[12] 2010-2020^[2]

2020 census

As of the 2020 census, there were 10,280 people, 3,844 households, and 2,568 families residing in the county.^[13] The population density was 9.3 inhabitants per square mile (3.6/km²). There were 4,788 housing units.

2010 census

As of the 2010 census, there were 10,149 people, 3,823 households, and 2,655 families residing in the county. The population density was 9.2 inhabitants per square mile (3.6/km²). There were 4,905 housing units at an average density of 4.5 units per square mile (1.7 units/km²). The racial makeup of the county was 61.7% white, 34.5% American Indian, 0.2% Asian, 0.1% black or African American, 0.4% from other races, and 3.0% from two or more races. Those of Hispanic or Latino origin made up 1.2% of the population. In terms of ancestry, 31.3% were German, 19.2% were Norwegian, 6.3% were Irish, and 3.8% were American.

Of the 3,823 households, 34.4% had children under the age of 18 living with them, 49.1% were married couples living together, 13.4% had a female householder with no husband present, 30.6% were non-families, and 27.3% of all households were made up of individuals. The average household size was 2.58 and the average family size was 3.11. The median age was 39.5 years.

The median income for a household in the county was $37,708 and the median income for a family was $46,146. Males had a median income of $34,080 versus $28,423 for females. The per capita income for the county was $19,825. About 14.3% of families and 20.0% of the population were below the poverty line, including 33.9% of those under age 18 and 11.0% of those age 65 or over.

Communities

Cities

Sisseton (county seat)
Wilmot

Towns

Census-designated places

Unincorporated communities^[5]

Hammer
Hartford Beach
Hiawatha Beach
Lindon Beach
Shady Beach
Victor

Townships

Agency
Alto
Becker
Bossko
Bryant
Dry Wood Lake
Easter
Enterprise
Garfield
Geneseo
Goodwill
Grant
Harmon
Hart
Lake
Lawrence
Lee
Lien
Lockwood
Long Hollow
Minnesota
Norway
One Road
Rosholt
Ortley
Sisseton
Springdale
Spring Grove
Summit
Victor
White Rock

Notable people

Sleepy Eye, Sisseton Sioux chief
Gene Okerlund, wrestling announcer

Politics

United States presidential election results for Roberts County, South Dakota^[14]
Year	Republican		Democratic		Third party(ies)
Year	No.	%	No.	%	No.	%
2024	2,514	60.59%	1,560	37.60%	75	1.81%
2020	2,404	55.82%	1,828	42.44%	75	1.74%
2016	2,144	55.13%	1,540	39.60%	205	5.27%
2012	1,883	44.24%	2,302	54.09%	71	1.67%
2008	1,781	39.26%	2,672	58.91%	83	1.83%
2004	2,396	48.09%	2,527	50.72%	59	1.18%
2000	2,237	54.91%	1,700	41.73%	137	3.36%
1996	1,646	37.99%	2,186	50.45%	501	11.56%
1992	1,437	34.87%	1,716	41.64%	968	23.49%
1988	2,012	46.67%	2,267	52.59%	32	0.74%
1984	2,767	57.17%	2,063	42.62%	10	0.21%
1980	2,904	57.98%	1,829	36.51%	276	5.51%
1976	1,915	39.73%	2,890	59.96%	15	0.31%
1972	2,187	42.29%	2,976	57.54%	9	0.17%
1968	2,225	42.68%	2,651	50.85%	337	6.46%
1964	1,931	35.12%	3,567	64.88%	0	0.00%
1960	2,857	48.05%	3,089	51.95%	0	0.00%
1956	2,854	46.79%	3,246	53.21%	0	0.00%
1952	3,566	58.56%	2,524	41.44%	0	0.00%
1948	2,211	39.12%	3,277	57.98%	164	2.90%
1944	2,721	47.36%	3,024	52.64%	0	0.00%
1940	3,504	48.30%	3,750	51.70%	0	0.00%
1936	1,934	32.50%	3,820	64.19%	197	3.31%
1932	1,381	21.69%	4,440	69.72%	547	8.59%
1928	2,966	52.73%	2,619	46.56%	40	0.71%
1924	1,744	40.99%	215	5.05%	2,296	53.96%
1920	2,335	49.73%	447	9.52%	1,913	40.75%
1916	1,259	47.17%	1,191	44.62%	219	8.21%
1912	0	0.00%	812	33.02%	1,647	66.98%
1908	1,562	61.02%	777	30.35%	221	8.63%
1904	2,282	75.02%	584	19.20%	176	5.79%
1900	1,875	62.11%	1,067	35.34%	77	2.55%
1896	1,324	58.20%	929	40.84%	22	0.97%
1892	538	62.85%	68	7.94%	250	29.21%