Family name Карстенсен (Carstensen 
, Карстенсен 
) , all over the world, is a common surname. The family name Карстенсен is habitual in Denmark, where it is quite a common surname, Germany, where it is quite a rare surname, and Norway. In absolute terms, the name is most common in Germany, Denmark, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Carstensen | Germany, Norway, Mexico, United States, Denmark |
| Карстенсен | Ukraine |