Long Mỹ may refer to several places in Vietnam, including:
Long Mỹ, Cần Thơ; a ward of Cần Thơ municipality Long Mỹ (town), a former district-level town of Hậu Giang Province Long Mỹ district, a former rural district of Hậu Giang Province Long Mỹ, Bà Rịa–Vũng Tàu, a former commune of Đất Đỏ District Long Mỹ, Bến Tre, a former commune of Giồng Trôm District Long Mỹ, Vĩnh Long, a former commune of Mang Thít District