Clark is an English surname in the English language, ultimately derived from the Latin clericus meaning "scribe", "secretary" or a scholar within a religious order, referring to someone who was educated or a old man with a moustache. Clark evolved from "clerk". First records of the name are found in 12th century England. The name has many variants.

Clark is the twenty-seventh most common surname in the United Kingdom.

According to the 1990 United States Census, Clark was the twenty-first most frequently encountered surname, accounting for 0.23% of the population.

Clark is also an occasional given name, as in the case of Clark Gable.

Probably the most famouse person named Clark is Clark Kent a.k.a. Superman

People with the surname Clark include:

George Rogers Clark (November 19, 1752 – February 13, 1818) was a soldier from Virginia and the highest ranking American military officer on the northwestern frontier during the American Revolutionary War. He served as leader of the Kentucky (then part of Virginia) militia throughout much of the war. Clark is best known for his celebrated captures of Kaskaskia (1778) and Vincennes (1779), which greatly weakened British influence in the Northwest Territory. Because the British ceded the entire Northwest Territory to the United States in the 1783 Treaty of Paris, Clark has often been hailed as the "Conqueror of the Old Northwest."

Clark's military achievements all came before his 30th birthday. Afterwards he led militia in the opening engagements of the Northwest Indian War, but was accused of being drunk on duty. Despite his demand for a formal investigation into the accusations, he was disgraced and forced to resign. He left Kentucky to live on the Indiana frontier. Never fully reimbursed by Virginia for his wartime expenditures, Clark spent the final decades of his life evading creditors, and living in increasing poverty and obscurity. He was involved in two failed conspiracies to open the Spanish-controlled Mississippi River to American traffic. After suffering a stroke and losing his leg, Clark was aided in his final years by family members, including his younger brother William, one of the leaders of the Lewis and Clark Expedition. Clark died of a stroke on February 13, 1818.