Surname Dalpiaz (Dalpiaz 
) , around the globe, is quite a rare cognomen. The surname Dalpiaz is habitual in Italy, where it is quite a rare surname, Brazil, where it is a rare surname, and Austria. In absolute terms, it is the most numerous in Brazil, Italy, and the United States. Much less frequently, Dalpiaz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Dalpiaz | Argentina, Brazil, Italy, Germany, United States |
| vigilio dalpiaz IT (b. 1887) |
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claus dalpiaz Austrian ice hockey player, AT (b. 1971) |
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| unírio dalpiaz BR (b. 1954) |
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| david dalpiaz Ph.D. University of Illinois at Urbana-Champaign 2014 |
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| walt dalpiaz college basketball player (1970–1970) Saint Francis (PA) |
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| fabiano dalpiaz Ph.D. Università di Trento 2011 (b. 1981) |
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