An Nhơn (listenⓘ) is a district-level town of Bình Định Province in the South Central Coast region of Vietnam.

[1] It has a population density of 779 people per km2, and they are distributed unevenly, with high concentrations in the wards of Bình Định and Đập Đá.

It is located along the National Route 1 20 km from the city of Quy Nhơn.

In 1778, the Tây Sơn dynasty settled and developed An Nhơn into the emperor's fortress.

In May 1799, after accounting for the stronghold, Nguyễn Ánh changed its name to Bình Định.