Grady County is a county located in the U.S. state of Oklahoma. As of the 2020 census, the population was 54,795. Its county seat is Chickasha. It was named for Henry W. Grady, an editor of the Atlanta Constitution and southern orator.

Grady County is part of the Oklahoma City, OK Metropolitan Statistical Area.

Grady County was part of the land given to the Choctaw by the Treaty of Dancing Rabbit Creek, in exchange for property in the southeastern United States. In 1837, the Chickasaw joined the Choctaws, and in 1855 a treaty separated the two tribes, and the Chickasaw acquired an area that included much of Grady County. Most of the present Grady County became a part of Pickens County in the Chickasaw Nation.

Before the Civil War, Randolph B. Marcy blazed the California Road through this area, reporting a Waco and a Wichita village. In 1858, while the Comanches were holding a meeting with the Wichita, Choctaw, and Chickasaw, Federal troops attacked a party of Comanches. Although the commander of Fort Arbuckle had been informed about the meeting, the troops' commander, Major Earl Van Dorn, had not consulted him before the attack. As a result, the troops killed 60 Comanches and four Wichitas. Fearing a Comanche reprisal, the other tribes fled to safety at Fort Arbuckle. At the end of the Civil War, the Five Civilized Tribes and the Caddo, Delaware, Kiowa, Comanche, Apache, Cheyenne, Arapaho, and Osage signed a peace agreement and pledged to stand united against any unjust demands that the federal government made at the war's end. The agreement was known as the Camp Napoleon Compact.

The first railroad in this area was built to the town of Minco in 1890 by the Chicago, Kansas and Nebraska Railway. The company was acquired by the Chicago, Rock Island and Pacific Railroad (Rock Island) during the following year. In 1892, the Rock Island built a track connecting Chickasha, Ninnekah, and Rush Springs to the Texas border. The same railroad built a line from Chickasha to Mangum in 1900. The Oklahoma City and Western Railroad (sold to the St. Louis and San Francisco Railway in 1907) constructed tracks from Oklahoma City to Chickasha, which it extended to the Texas border in the following year. Between 1906 and 1910, the Oklahoma Central Railway (sold to the Atchison, Topeka and Santa Fe Railway in 1914) built from Lehigh to Chickasha.

The 1898 Curtis Act stripped the Chickasaw Nation of its authority, and communal land was forced into allotment, paving the way for statehood. When Oklahoma acquired statehood in 1907, the Chickasaw Nation ceased to exist, Grady County was organized and Chickasha was named the county seat. In 1911, Grady County annexed Washington, Prairie Valley, and the northern section of Dutton townships formerly in Caddo County, Oklahoma.

According to the U.S. Census Bureau, the county has a total area of 1,105 square miles (2,860 km), of which 1,100 square miles (2,800 km) is land and 4.4 square miles (11 km) (0.4%) is water. The county lies in the Red Bed Plains, and is mostly covered with rolling prairie. The Canadian River forms the northern boundary and the Washita River runs through the middle.

• Canadian County (north)
• McClain County (east)
• Garvin County (southeast)
• Stephens County (south)
• Comanche County (southwest)
• Caddo County (west)

Historical population

Census	Pop.	Note	%±
1910	30,309		—
1920	33,943		12.0%
1930	47,638		40.3%
1940	41,116		−13.7%
1950	34,872		−15.2%
1960	29,590		−15.1%
1970	29,354		−0.8%
1980	39,490		34.5%
1990	41,747		5.7%
2000	45,516		9.0%
2010	52,431		15.2%
2020	54,795		4.5%
2023 (est.)	57,375		4.7%
U.S. Decennial Census 1790-1960 1900-1990 1990-2000 2010

As of the census of 2000, there were 45,516 people, 17,341 households, and 12,797 families residing in the county. The population density was 41 inhabitants per square mile (16/km). There were 19,444 housing units at an average density of 18 units per square mile (6.9/km). The racial makeup of the county was 87.31% White, 3.06% Black or (United States Census), 4.85% Native American, 0.34% Asians, 0.04% Pacific Islander, 1.12% from other races, and 3.28% from two or more races. 2.89% of the population were Hispanic or Latino of any race.

There were 17,341 households, out of which 34.70% had children under the age of 18 living with them, 60.50% were married couples living together, 9.70% had a female householder with no husband present, and 26.20% were non-families. 22.90% of all households were made up of individuals, and 10.50% had someone living alone who was 65 years of age or older. The average household size was 2.58 and the average family size was 3.02.

In the county, the population was spread out, with 26.70% under the age of 18, 9.30% from 18 to 24, 27.70% from 25 to 44, 23.20% from 45 to 64, and 13.10% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 95.30 males. For every 100 females age 18 and over, there were 91.30 males.

The median income for a household in the county was $32,625, and the median income for a family was $39,636. Males had a median income of $30,306 versus $21,108 for females. The per capita income for the county was $15,846. About 10.40% of families and 13.90% of the population were below the poverty line, including 16.90% of those under age 18 and 14.60% of those age 65 or over.

Voter Registration and Party Enrollment as of June 30, 2023
Party		Number of Voters	Percentage
	Democratic	6,956	20.48%
	Republican	21,586	63.56%
	Others	5,420	15.96%
Total		33,962	100%

United States presidential election results for Grady County, Oklahoma

Year	Republican		Democratic		Third party(ies)
	No.	%	No.	%	No.	%
2020	18,538	80.25%	4,144	17.94%	419	1.81%
2016	17,316	77.70%	3,882	17.42%	1,088	4.88%
2012	14,833	75.61%	4,786	24.39%	0	0.00%
2008	15,195	73.35%	5,520	26.65%	0	0.00%
2004	14,136	70.31%	5,970	29.69%	0	0.00%
2000	10,040	61.69%	6,037	37.09%	199	1.22%
1996	7,228	46.34%	6,256	40.11%	2,114	13.55%
1992	6,997	39.40%	6,177	34.79%	4,583	25.81%
1988	7,994	53.84%	6,689	45.05%	165	1.11%
1984	11,042	69.19%	4,846	30.36%	72	0.45%
1980	8,131	58.20%	5,330	38.15%	510	3.65%
1976	4,686	39.20%	7,155	59.85%	114	0.95%
1972	7,762	67.50%	3,440	29.92%	297	2.58%
1968	4,242	38.15%	4,760	42.81%	2,117	19.04%
1964	3,569	31.97%	7,593	68.03%	0	0.00%
1960	5,913	52.06%	5,446	47.94%	0	0.00%
1956	5,191	43.39%	6,773	56.61%	0	0.00%
1952	6,348	45.16%	7,710	54.84%	0	0.00%
1948	2,882	26.16%	8,136	73.84%	0	0.00%
1944	4,069	34.55%	7,689	65.28%	20	0.17%
1940	4,299	34.62%	8,075	65.03%	43	0.35%
1936	3,013	24.90%	9,025	74.59%	61	0.50%
1932	2,034	18.03%	9,247	81.97%	0	0.00%
1928	6,332	62.64%	3,667	36.27%	110	1.09%
1924	2,640	30.75%	5,091	59.29%	855	9.96%
1920	3,403	41.71%	4,277	52.43%	478	5.86%
1916	1,272	23.75%	3,243	60.55%	841	15.70%
1912	1,121	25.08%	2,577	57.65%	772	17.27%

• Blanchard (partially in McClain County)
• Chickasha (county seat)
• Minco
• Tuttle

• Alex
• Amber
• Bradley
• Bridge Creek
• Ninnekah
• Norge
• Pocasset
• Rush Springs
• Verden

• Cox City
• Middleberg
• Tabler

• Agawam
• Acme
• Bailey

The following sites in Grady County are listed on the National Register of Historic Places:

• Chickasha Downtown Historic District, Chickasha
• Grady County Courthouse, Chickasha
• Griffin House, Chickasha
• Jewett Site, Bradley
• Knippelmeir Farmstead, Minco vicinity
• Minco Armory, Minco
• New Hope Baptist Church, Chickasha
• Oklahoma College for Women Historic District, Chickasha
• Pocasset Gymnasium, Pocasset
• Rock Island Depot, Chickasha
• Silver City Cemetery, Tuttle
• US Post Office and Federal Courthouse, Chickasha
• Verden Separate School, originally in Verden but relocated to Chickasha

• Tomassa (c. 1840–1900), translator

• Encyclopedia of Oklahoma History and Culture - Grady County
• Oklahoma Digital Maps: Digital Collections of Oklahoma and Indian Territory

35°01′N 97°53′W / 35.02°N 97.89°W / 35.02; -97.89