Ekaterina Ivanovna Kozitskaya, née Myasnikova (1746 – 1833) was a Russian industrialist. She was the daughter and heir of the copper miner and married , one of the secretaries of Catherine the Great. She inherited the copper mines in Ust-Katav and elsewhere in the Urals. She managed the mines herself with great success and has been called the richest woman in 18th-century Russia. The asteroid 3702 Trubetskaya is named after her.