Mission is a city in Hidalgo County, in the US state of Texas, United States. The population was 85,778 at the 2020 census and an estimated 86,635 in 2022. Mission is part of the McAllen–Edinburg–Mission and Reynosa–McAllen metropolitan areas.

Pierre Yves Kéralum OMI (1817–1872) was a French-born Catholic missionary and member of the Missionary Oblates of Mary Immaculate. He served in South Texas from 1853 to 1872, traveling long distances on horseback to minister to Catholics living on isolated ranches along the Rio Grande. He was also an architect who designed many buildings in the area, including the Immaculate Conception Cathedral in Brownsville, Texas.