Family name चक (Chalk 
, चक) , across the world, is quite a common surname. The cognomen चक is habitual in the United Kingdom, where it is quite a rare surname, Australia, and New Zealand. Not in comparison with a country's population, it is commonest in the United States, the United Kingdom, and Australia. Very seldom, चक is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chalk | United Kingdom, Canada, Australia, India, United States |
| एस एन चक Rtd. Director General of Police, Uttar Pradesh, and founder of Desh Shakti Party, IN (b. 1951) |
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| प्रतिमा चक Politician and social activist, IN |
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