- An English and Scottish occupational surname, from occupations for a scribe, secretary, or cleric.
- A male given name transferred from the surname.
- A locale in the United States.
- A township in New Jersey; named for Declaration of Independence signatory Abraham Clark.
- A city, the county seat of Clark County, South Dakota.
- A borough of Pennsylvania.
- A city in Missouri; named for Confederate general John Bullock Clark Jr..
- A former settlement in California.
- An unincorporated community in Colorado.
- An unincorporated community in Nevada.
- An unincorporated community in Washington.
- An unincorporated community in West Virginia.
- An unincorporated communityt in Wisconsin.
- A locale in the Philippines.
- According to the 2010 United States Census, Clark is the 27th most common surname in the United States, belonging to 562,679 individuals. Clark is most common among White (74.7%) and Black/African American (19.0%) individuals.