Yên Thịnh may refer to several places in Vietnam, including:
Yên Thịnh, Thái Nguyên, a commune of Thái Nguyên province Yên Thịnh, Yên Bái, a former ward of Yên Bái Yên Thịnh, Ninh Bình, a former township and capital of Yên Mô District Yên Thịnh, Lạng Sơn, a former commune of Hữu Lũng District Yên Thịnh, Thanh Hoá, a former commune of Yên Định District