Family name Ciesielczyk (Ciesielczyk 
) , around the world, is a rare cognomen. The last name Ciesielczyk is characteristic of Poland, where it is quite a rare surname, Estonia, where it is a rare surname, and Hungary. In absolute terms, this name is the most popular in Poland, the United States, and France. Also, Ciesielczyk is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ciesielczyk | Hungary, Poland, Estonia, United States, France |
| waldemar ciesielczyk Polish fencer, PL (b. 1958) |
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| michał ciesielczyk researcher |
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| filip ciesielczyk researcher (ORCID 0000-0001-5970-2689) |
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| joanna ciesielczyk Polish volleyball player, PL (b. 1999) |
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