"Mother Nature's Son" is a song by the English rock band the Beatles from their 1968 double album The Beatles (also known as "the White Album"). The song was written primarily by Paul McCartney, and credited to Lennon–McCartney. It was inspired by a lecture given by the Maharishi Mahesh Yogi while the Beatles were in India. The same lecture inspired Lennon's song "Child of Nature", the tune of which he later re-used for "Jealous Guy". Although credited to the group, the song was performed by McCartney alone (with a brass arrangement by George Martin), while the other Beatles were working on other "White Album" songs.

According to Paul McCartney he was inspired by Nat King Cole's song "Nature Boy" he heard growing up. He wrote the song in Liverpool when he visited his father.