Nathaniel Jarvis Wyeth (January 29, 1802 – August 31, 1856) was an American inventor and businessman in Boston, Massachusetts who contributed greatly to its ice industry. Due to his inventions, Boston could harvest and ship ice internationally. In the 1830s, he was also a Mountain man who led two expeditions to the Northwest and set up two trading posts, one in present-day Idaho and one in present-day Oregon.