Area codes 210 and 726

Greater San Antonio, officially designated San Antonio–New Braunfels, is an eight-county metropolitan area in the U.S. state of Texas defined by the Office of Management and Budget (OMB). The metropolitan area straddles South Texas and Central Texas and is on the southwestern corner of the Texas Triangle. The official 2020 U.S. Census showed the metropolitan area's population at 2,558,143—up from a reported 1,711,103 in 2000—making it the 24th largest metropolitan area in the United States. Austin–Round Rock lies about 80 miles northeast of Greater San Antonio. San Antonio–New Braunfels is the third-largest metro area in Texas, after Dallas–Fort Worth–Arlington and Houston–The Woodlands–Sugar Land.

San Antonio ( SAN an-TOH-nee-oh; Spanish for "Saint Anthony"), officially the City of San Antonio, is the seventh-most populous city in the United States, second largest city in the Southern United States, and the second-most populous city in Texas as well as the 12th most populous city in North America with 1,434,625 residents in 2020. Founded as a Spanish mission and colonial outpost in 1718, the city became the first chartered civil settlement in present-day Texas in 1731. The area was still part of the Spanish Empire, and later of the Mexican Republic. It is the state's oldest municipality, having celebrated its 300th anniversary on May 1, 2018.The city was the fastest-growing of the top ten largest cities in the United States from 2000 to 2010, and the second from 1990 to 2000. The city of San Antonio serves as the seat of Bexar County; San Antonio is the center of the San Antonio–New Braunfels metropolitan statistical area. Commonly called the Greater San Antonio, the metropolitan area had a population of 2,550,960 based on the 2019 U.S. census estimates, making it the 24th-largest metropolitan area in the United States and third-largest in Texas. Straddling the regional divide between South and Central Texas, San Antonio anchors the southwestern corner of an urban megaregion colloquially known as the Texas Triangle. Downtown San Antonio and Downtown Austin are approximately 80 miles (129 km) apart, both falling along the Interstate 35 corridor. Some observers expect the two metropolitan regions to form a new metroplex similar to Dallas and Fort Worth.San Antonio was named by a 1691 Spanish expedition for the Portuguese priest Saint Anthony of Padua, whose feast day is June 13. The city contains five 18th-century Spanish frontier missions, including The Alamo and San Antonio Missions National Historical Park, which together were designated UNESCO World Heritage sites in 2015. Other notable attractions include the River Walk, the Tower of the Americas, SeaWorld, the Alamo Bowl, and Marriage Island. Commercial entertainment includes Six Flags Fiesta Texas and Morgan's Wonderland amusement parks. According to the San Antonio Convention and Visitors Bureau, the city is visited by about 32 million tourists a year. It is home to the five-time NBA champion San Antonio Spurs, and hosts the annual San Antonio Stock Show & Rodeo, one of the largest such events in the U.S. The U.S. Armed Forces have numerous facilities in and around San Antonio; Fort Sam Houston is the only one within the city limits. Lackland Air Force Base, Randolph Air Force Base, Kelly Air Force Base, Camp Bullis, and Camp Stanley are outside the city limits. San Antonio is home to four Fortune 500 companies and the South Texas Medical Center, the only medical research and care provider in the South Texas region. San Antonio is also the largest majority-Hispanic city in the United States, with 64% of its population being Hispanic.

The Roman Catholic Archdiocese of San Antonio is an archdiocese of the Catholic Church in the United States, and sui juris Latin Church in full communion with the pope of Rome. It encompasses 27,841 square miles (72,110 km2) in the U.S. state of Texas. The Roman Catholic Archdiocese of San Antonio had a self-reported 2018 population of 796,954, up from 728,001 in 2014. The archdiocese includes the city of San Antonio and the following counties: Val Verde, Edwards, Kerr, Gillespie, Kendall, Comal, Guadalupe, Gonzales, Uvalde, Kinney, Medina, Bexar, Wilson, Karnes, Frio, Atascosa, Bandera County, and the portion of McMullen north of the Nueces River.On August 28, 1874, the Roman Catholic Diocese of Galveston was divided and the northern territory was canonically erected by the Holy See as the Roman Catholic Diocese of San Antonio. Originally part of the Ecclesiastical Province of New Orleans, it was subsequently elevated on August 3, 1926, to a metropolitan archdiocese.The archbishop of San Antonio also serves as the metropolitan of the ecclesiastical province of San Antonio with the Roman Catholic Archdiocese of San Antonio overseeing the following suffragan dioceses: Amarillo, Dallas, El Paso, Fort Worth, Laredo, Lubbock, and San Angelo. All of Texas' dioceses had been suffragan sees under San Antonio until December 2004 when Pope John Paul II created the new Ecclesiastical Province of Galveston-Houston and elevated the Archdiocese of Galveston-Houston to a metropolitan see.

San Fernando Cathedral (Spanish: Catedral de San Fernando) also called the Cathedral of Our Lady of Candelaria and Guadalupe (Spanish: Catedral de Nuestra Señora de la Candelaria y Guadalupe) is a cathedral of the Roman Catholic Church located in downtown San Antonio, Texas, United States, facing the city's Main Plaza. It is the mother church of the Archdiocese of San Antonio and the seat of its archbishop. Its dome serves as the city of San Antonio's cultural and geographical center. The cathedral is also known as the Church of Nuestra Señora de la Candelaria y Guadalupe and is listed on the National Register of Historic Places. It is notable as one of the oldest cathedrals in the United States.

The Military Plaza (Plaza de Armas) in San Antonio, Texas dates back to the 18th century as a military and commercial center in San Antonio. It is the location of San Antonio City Hall and the Spanish Governor's Palace.

Main and Military Plazas Historic District is a historic district in San Antonio, Texas. It was listed on the National Register of Historic Places in 1979, with a boundary increase in 2019.The area encompasses the old Presidio San Antonio de Béxar, where the Spanish troops and the military governor of Texas were stationed.It includes the following separately-listed Registered Historic Places, one or more of which are National Historic Landmarks: Spanish Governor's Palace, Vogel Belt Building Complex (restored for city offices), Church of Nuestra Señora de la Candelaria y Guadalupe, also known as the Cathedral of San Fernando Bexar County Courthouse

Presidio de Béxar was a Spanish fort built near the San Antonio River, located in what is now San Antonio, Texas, in the United States. It was designed for protection of the mission San Antonio de Valero and the Villa de Bejar. The Presidio de Bejar was founded on May 5, 1718 by Spanish colonial official Martin de Alarcon, and his party of thirty-five soldiers. The Villa de Bejar is known for being the first Spanish settlement of San Antonio and consisted of the families of the Presidio Soldiers and those of the prior expeditions. It also served to secure Spain's claim to the region against possible encroachment from other European powers.

The Council House Fight, often referred to as the Council House Massacre, was a fight between soldiers and officials of the Republic of Texas and a delegation of Comanche chiefs during a peace conference in San Antonio on March 19, 1840. About 35 Comanche men and women under chief, Mukwooru (aka Muguara) represented just a fraction of the Penateka band of the southern portion of the Comanche tribe. He knew he had no authority to speak for the Southern tribes as a whole and thus, any discussions of peace would be simply a farce. However, if Mukwooru could re-establish a lucrative trade with the San Antonian's perhaps a peace, by proxy, could be established. Just as the Comanche had done had been done for centuries in San Antonio, Santa Fe and along the Rio Grande River. They would rob one settlement and then sell to the other. On March Chief Muguara brought in some trade articles and horses as well as an abused and tortured 14-year captive white girl named Matilda Lockhart that they had kidnapped and hoped that they would fetch a better price for her ransom, than what they received from nine year old, James Putnam/Putman just two weeks before. If the price was right, they may soon deliver over more captives. The remainder of the Penateka Comanche were, at the time, at Enchanted Rock with thirteen other captives that they planned to sell one by one to fetch better prices. The Southern Comanche had broken the 1835 as well as the 1838 treaty traveling hundreds of miles down the Colorado River and Guadalupe Rivers into the Texas settlements to steal horses and abduct children and had no intention of stopping this lucrative market economy that gave their young men a purpose. The various bands of the Southern Comanche had about thirty white captives and sixty Mexican captives, all abducted in recent raids. The council at the courthouse in San Antonio began when the 30 Comanche men were invited into a courthouse in downtown San Antonio, on the east side of the square east of San Fernando Cathedral, facing it. The men brought their women who concealed several tomahawks under the blankets they held. The men left their rifles with their horse handlers out front and unstrung their bows and walked in as a procession and sat on the floor facing the table of Texian representative including judges and Colonels. Captive Matilda Lockhart was delivered over, and when the other captives were not, and when they asked for a better price, the Texans took the Comanche delegation as hostages for a forced prisoner exchange. Soldiers from a nearby building entered the premises, the Comanche began to stab the Texans. The council ended with 12 Comanche men shot to death inside the Council House and 23 others killed outside. Two elderly men and two dozen women were held captive in order to obtain an exchange for the remaining Texan children held by the Comanche.

City Tower is a skyscraper in downtown San Antonio, in the U.S. state of Texas. The 22-story building previously served as the headquarters for Frost Bank from 1975 to 2019 until Frost Bank moved into the eponymously named Frost Tower. In 2015 the city of San Antonio acquired the building for $52.9 million and has allotted $88 million for renovations to the building. Upon completion of the renovations the building will consolidate 24 city departments and 1,400 city employees and will serve as the main office building for the city of San Antonio. At a height of 300 feet (99 meters), it is the 11th tallest building in San Antonio.

Camp John Wise is a former United States Army military garrison, located in San Antonio, Texas. During World War I it was used as a training field for the U. S. Army Balloon Corps between 1917 until 1919. The airfield was one of thirty-two Air Service training camps established in 1918 after the United States entry into World War I. It named for John Wise of Philadelphia, a pioneer balloonist who constructed a balloon in which he set a world distance record in 1869.

The Bexar County Courthouse is a historic building in downtown San Antonio, Texas, USA. The building was designed by architect J. Riely Gordon, and borders Main Plaza, along with such other architectural landmarks as the Cathedral of San Fernando. The style is Romanesque Revival, and the main material used is red sandstone. Ground was broken for Gordon's structure on August 4, 1891, and the cornerstone was laid December 17, 1892. After several delays, construction was fully completed in 1896. The building was added to the National Register of Historic Places in 1977. The Courthouse currently functions as the county seat of Bexar County.

The Spanish Governor's Palace is a historic adobe from the Spanish Texas period located in Downtown San Antonio. It is the last visible trace of the 18th-century colonial Presidio San Antonio de Béxar complex, and the only remaining example in Texas of an aristocratic 18th-century Spanish Colonial in−town residence. The National Geographic Society has named the landmark "the most beautiful building in San Antonio." The building was designated a National Historic Landmark in 1970. It is now owned by the city, and is open to the public as a museum.