Ilya Iosifovich Moiseev (Russian: Илья Иосифович Моисеев; 15 March 1929 – 11 October 2020) was a Russian chemist. He was an expert in both kinetics and the coordination chemistry of transition metals. He was known for his works in metal-complex catalysis. In 1992, he was elected to the Russian Academy of Sciences. Moiseev was born in Moscow.
Moiseev died on 11 October 2020 in Moscow, aged 91.