Cognomen Wirstad (Wirstad 
) , all around the world, is a rare family name. The family name Wirstad is habitual in Norway, where it is quite a rare surname, Denmark, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Wirstad | Norway, Denmark, United States |
| hans fredrik wirstad Norwegian veterinarian (b. 1897) |
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| trond halvorsen wirstad Norwegian politician, NO (b. 1904) |
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| christian wirstad Norwegian association football player (b. 1996) |
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