Concepción de Ataco is a municipality and city within the Ahuachapán Department, El Salvador. It has an area of 61.03 km ² and a population of 18,101 inhabitants.

Elk Grove is a city in Sacramento County, California, United States. Located just south of the state capital of Sacramento, it is part of the Sacramento metropolitan area. As of the 2020 Census, the population of the city was 176,124. A 2021 Census estimate puts the population of the city at 178,997. Elk Grove has many wineries, wine cellars, and vineyards. Elk Grove was the fastest-growing city in the U.S. between July 1, 2004, and July 1, 2005, and is also presently the second-largest city in Sacramento County by population.