Maxim may refer to:

• Maxim (magazine), an international men's magazine
• Maxim Radio, Maxim magazine's radio channel on Sirius Satellite Radio
• Maxim, a fictional ship in the manga and anime series One Piece

Carl Johann Maximowicz (also Karl Ivanovich Maximowicz, Russian: Карл Иванович Максимович; 1827 in Tula, Russia – 1891 in Saint Petersburg) was a Russian botanist. Maximowicz spent most of his life studying the flora of the countries he had visited in the Far East, and naming many new species. He worked at the Saint Petersburg Botanical Gardens from 1852 as curator of the herbarium collection, becoming Director in 1869.