Christa Vahlensieck (née Kofferschläger; born 27 May 1949) is a German former long distance runner and pioneer in the marathon for women.
During her running career, from 1973 to 1989, she simultaneously achieved a world record in the 10,000 metres, in the 25k road race and the marathon; she holds 17 German championship titles.
In the same year, she was the first German winner at the Schwarzwald Marathon in 2:45:43, a time that still stands as the course record.
On 10 September 1977, her victory at the Berlin Marathon in 2:34:48 gave her another world record.
In 1988 Vahlensieck ran in the special event "Friendship Run Wuppertal-Košice", a course over 1765 km, trespassing the Iron Curtain: "an awesome experience", as she remembers.