Ladislav František Čelakovský (December 3, 1863 – December 31, 1916) was a Czech mycologist and botanist who was born in Prague. He was the son of botanist Ladislav Josef Čelakovský (1834-1902).
Čelakovský was a professor of plant physiology at the Czech Technical University in Prague, and was a specialist in research of slime molds. He was the author of an 1890 book on the phylum Myxomycota called České myxomycety.