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.

Mission is in southern Hidalgo County. It is bordered to the east by McAllen, the largest city in the county, to the north by Palmhurst, to the west by Palmview, and to the south by the Mexico–United States border along the Rio Grande.

The Interstate 2/U.S. Route 83 freeway passes through Mission, south of the center of town. The highway leads east 5 miles (8 km) to downtown McAllen and 41 miles (66 km) to Harlingen. Interstate 2 ends 7 miles (11 km) west of Mission; US 83 leads west 34 miles (55 km) to Rio Grande City.

According to the United States Census Bureau, Mission has a total area of 34.1 square miles (88.2 km2), of which 0.1 square miles (0.2 km2), or 0.20%, is covered by water.

As of the census of 2020, there were 85,778 people, 25,172 households, and 20,139 families were residing in the city.

As of the census of 2010, there were 77,058 people, _ households, and _ families resided in the city.

As of the census of 2000, there were 45,408 people, 13,766 households, and 11,384 families resided in the city. The population density was 1,881.9 inhabitants per square mile (726.6/km2). The 17,723 housing units had an average density of 734.5 per square mile (283.6/km2). The racial makeup of the city was 77.63% White, 0.37% African American, 0.38% Native American, 1.63% Asian, 18.65% from other races, and 2.34% from two or more races. Hispanics or Latinos of any race were 81.03% of the population.

Of the 13,766 households, 43.4% had children under 18 living with them, 64.8% were married couples living together, 14.5% had a female householder with no husband present, and 17.3% were not families; 15.3% of all households were made up of individuals, and 9.1% had someone living alone who was 65 or older. The average household size was 3.29, and the average family size was 3.68.

In the city, the age distribution was 32.1% under 18, 9.8% from 18 to 24, 26.8% from 25 to 44, 17.1% from 45 to 64, and 14.2% who were 65 or older. The median age was 30 years. For every 100 females, there were 91.1 males. For every 100 females 18 and over, there were 85.3 males.

The median income for a household in the city was $30,647, and the median income for a family was $33,465. Males had a median income of $25,710 versus $20,718 for females. The per capita income for the city was $12,796. About 22.6% of families and 26.8% of the population were below the poverty line, including 37.4% of those under age 18 and 15.6% of those age 65 or over.

The United States Postal Service operates in the city of Mission. Local zip codes include 78571, 78572, 78573, and 78574.

Mission shares the same economic growth that nearby McAllen is experiencing. The Mission Economic Development Corporation promotes development in the area.

The city has been advertised as the "Home of the Ruby Red Grapefruit" since 1921, due to the fruit being commonly grown in the area. The city is also home to the Texas Citrus Exchange. The city holds the annual Texas Citrus Fiesta Parade along Conway Avenue, which features fruit-decorated floats, bands, law enforcement agencies, fire departments, and many local and city government officials.

Moore Air Force Base (deactivated) is located 15 miles (24 km) north of the city. It is the location of the First Lift Station of the Mission Canal Company that once irrigated 15,000 acres (61 km2) of farmland in the Rio Grande Valley.

Most of Mission is a part of the Mission Consolidated Independent School District. Other portions extend into the La Joya Independent School District and the Sharyland Independent School District.

Mission CISD operates Mission High School and Veterans Memorial High School. Sharyland ISD Mission is divided between Sharyland High School and Sharyland Pioneer High School. LJISD Mission is zoned to Palmview High School.

In addition, South Texas Independent School District operates magnet schools that serve the community.

Mission is also the site of San Juan Diego Academy, a Catholic high school operated by the Roman Catholic Diocese of Brownsville.

The Speer Memorial Library serves Mission. The facility has 48,760 square feet (4,530 m2) of space.