Christensen is of Scandinavian origin, specifically from Denmark and Norway. It is derived from the patronymic surname meaning "son of Christian." This name has been popular among families of Scandinavian heritage for generations and continues to be widely used today. The name's popularity can be attributed to its association with Christianity, as it pays homage to Christ, and the enduring appeal of Scandinavian culture. Christensen is typically pronounced /ˈkrɪstənsən/ in English, but variations may occur based on regional accents or preferences.
The name Christensen experienced a notable dip in popularity between 2018 and 2023, with only half as many births occurring in the latter year compared to five years prior.