Carstens is a surname. Notable people with the surname include:
Agustín Carstens (b. 1958), Mexican economistArno Carstens, South Africa n singer-songwriterAsmus Jacob Carstens (1754–1798), Danish-German painterCamilla Carstens (b. 1977), Norwegian team handball playerCarl Wilhelm Carstens (1887–1950), Norwegian geologistDavid Carstens (1914–1955), South African boxerDeon Carstens (b. 1979), South African rugby union footballerHarold H. Carstens (1925–2009), president of Carstens PublicationsIngvild Ryggen Carstens (b. 1980), Norwegian ski mountaineer, heptathlete and pentathleteJordan Carstens (b. 1981), American football defensive tackleKarl Carstens (1914–1992), German politician and president of the Federal Republic of GermanyLesley Carstens (b. 1965), South African sprint canoerLina Carstens (1892–1978), German film- and theater actressNico Carstens, South African accordionist and songwriterPeter Carstens (1903–1945), German geneticist and animal breeder and SS-OberführerTheodore Carstens, American fencerVeronica Carstens (1923–2012), wife of the German President Karl CarstensWilhelm Carstens (1869–19??), German rower