Axel Krister Edward Leonard Jägerskiöld (November 12, 1867 – August 4, 1945) was a Finland-born Swedish zoologist.
Jägerskiöld was born on Mejlan estate in Finland, Nyland county where his father Gustaf Magnus Leonard (1831–71) was a captain in the Russian navy.
After the death of his father, he moved to Stockholm when his mother Johanna Vilhelmina Augusta married her cousin A. H. Ramsay.
He became interested in hunting, sailing and long walks where he was inspired to study nature by his teacher Alexander Skånberg and his cousin professor Christian Loven.
He received a doctorate in 1893 and continued to study parasitic roundworms until 1909 and had to move away from working with the microscope due to eye problems.