Yanaguana, Countdown City, Saytown, Alamo City, Mission City, River City, and Military City, U.S.A..

ere's a more detailed breakdown of some of the nicknames:
Alamo City: This nickname is arguably the most well-known and refers to the city's most famous landmark, the Alamo.
Mission City: This nickname stems from the city's history as a place where five Spanish colonial missions were established along the San Antonio River.
River City: This nickname reflects the city's location on the San Antonio River and the importance of the river to the city's development.
Military City, U.S.A.: This nickname, which the city trademarked in 2017, recognizes the significant military presence in San Antonio, particularly Joint Base San Antonio.
Yanaguana: This nickname comes from the indigenous Payaya people who called the area around the San Antonio River Valley "Yanaguana," meaning "refreshing waters".
Countdown City: This nickname refers to San Antonio's area code, "210".
Saytown: This nickname is a callback to the city's initials, "SA".