Cognomen Locust (Locust 
, Locuste 
, Locusta ) , across the world, is a rare family name. The surname Locust is characteristic of Italy, where it is a rare surname, the United States, and New Zealand. Measured by absolute frequency, it is the most numerous in the United States, Italy, and France. Much less frequently, Locust is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Locust | South Africa, Taiwan, United States, Brazil, New Zealand |
| Locuste | Italy, France, United States |
| Locusta | Italy, Brazil |
| carol locust (b. 1937) |
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| lori locust American football coach (born 1964), US (b. 1964) |
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