San Miguel is the fourth most populous city in El Salvador after Santa Ana and Soyapango and the second most important after San Salvador. It is located 138 km east of the capital, San Salvador. It is also the capital of the department of San Miguel and a municipality. The population of the city in (2007) was 218,410 habitants.

After the foundation of the Villa de, the Spaniards sent Captain Luis de Moscoso east of the Lempa River with the entrust of the stablishment of a new Spanish village. Such event took place on May 8, 1530, being the name given to the new village San Miguel de la Frontera (San Miguel of the Frontier). By 1586 the village had obtained the title of city.

The city has been an important center of the agriculture, textile and chemical industries of El Salvador. However, in the last decade the services sector, specially health care and commerce, have increased considerably, resulting in significant private investments in hospitals and shopping malls within the city. This has been usually attributed partly for the high inflow of remittances (at least 35% of the total, that represent around 18% of the national GDP ) that salvadorans living abroad send to the eastern zone of the country.

El Salvador ⁱ/ɛl ˈsælvədɔr/ (Spanish: República de El Salvador, literally 'Republic of The Savior') is the smallest and the most densely populated country in Central America. The country's capital city and largest city is San Salvador; Santa Ana and San Miguel are also important cultural and commercial centers in the country as well as Central America. El Salvador borders the Pacific Ocean on the west, and the countries of Guatemala to the north and Honduras to the east. Its easternmost region lies on the coast of the Gulf of Fonseca, opposite Nicaragua. As of 2009, El Salvador had a population of approximately 5,744,113 people, composed predominantly of Mestizos.

The colón was the official currency of El Salvador from 1892 to 2001, when it adopted the U.S. Dollar.

In 2010 El Salvador ranked in the top 10 among Latin American countries in terms of the Human Development Index and in the top 3 in Central America (behind Costa Rica and Panama), due in part to ongoing rapid industrialization. In addition, tropical forests and overall forest cover has expanded by nearly 20 percent from the year 1992 to 2010. Making it one of the few countries experiencing reforestation.

San Miguel, Spanish for Saint Michael, describes numerous locations.

Fort San Miguel or Fuerte (de) San Miguel is the name of various military forts around the world: