Vladimir Mitrofanovich Arnoldi (Russian: ?????´??? ???????´????? ????´????) (Kozlov (Michurinsk), Russia (1871–1924)) was a Russian professor of biology.
He was a Corresponding Member of Russian Academy of Sciences and scientifically listed a number of valuable plants of Malaysia.
He lived in the Russian city of Tambov for much of his life.
His son Constantin Arnoldi became a prominent entomologist.