Caddo Gap is an unincorporated community and census-designated place (CDP) in Montgomery County, Arkansas, United States. It lies between Glenwood and Norman, on the Caddo River. It was first listed as a CDP in the 2020 census with a population of 39.

It is best known as the area in which explorer Hernando de Soto and his forces clashed with the Native American Tula tribe in 1541, a band loosely affiliated with the Caddo Confederacy. The expedition described the Tula Indians as the fiercest they had faced during their inward journey into North America. After this, the expedition turned back east, making it as far as the Mississippi River, where de Soto died. It is contested as to whether he died of fever, or from a wound received during the fighting. There the expedition had a secret burial ceremony and sent his body into the river. A monument to this event stands in the heart of the small community.

During the night of June 10–11, 2010, a flash flood along Little Missouri River killed at least 20 people in the campgrounds of the Albert Pike Recreation Area near Caddo Gap. In a matter of less than four hours water rose from 3 feet (0.91 m) to over 23 feet (7.0 m).

Caddo Gap is in the Caddo Hills School District.

Historical population

Census	Pop.	Note	%±
2020	39		—
U.S. Decennial Census 2020

Caddo Gap CDP, Arkansas – Racial and ethnic composition
Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.

Race / Ethnicity (NH = Non-Hispanic)	Pop 2020	% 2020
White alone (NH)	34	87.18%
Black or African American alone (NH)	0	0.00%
Native American or Alaska Native alone (NH)	1	2.56%
Asian alone (NH)	0	0.00%
Pacific Islander alone (NH)	1	2.56%
Some Other Race alone (NH)	0	0.00%
Mixed Race or Multi-Racial (NH)	2	5.13%
Hispanic or Latino (any race)	1	2.56%
Total	39	100.00%

• Osro Cobb, lawyer and politician