The 17th parallel north is a circle of latitude that is 17 degrees north of the Earth's equatorial plane. It crosses Africa, Asia, the Indian Ocean, the Pacific Ocean, Central America, the Caribbean and the Atlantic Ocean.

The parallel is particularly significant in the history of Vietnam (see below).

At this latitude the sun is visible for 13 hours, 9 minutes during the summer solstice and 11 hours, 7 minutes during the winter solstice.[1]

In 1976 the demarcation line was made irrelevant as Vietnam was unified following the withdrawal of American forces and the surrender of the South Vietnamese government.