Alta is a city in Buena Vista County, Iowa, United States. The population was 1,883 at the 2010 census.
Alta was platted in 1872, and it was incorporated in 1979. By 2004, Alta contained three general stores, two drug stores, two grocery stores, a shoe store, two hardware stores, a meat market, two lumber dealers, two agriculture implement dealers, bank two furniture stores, clothing store, barber shop, two saloons, music store, two jewelry stores, restaurant, four blacksmiths, two elevators, and a gristmill.
Halvor H. Peterson (1831–1917), Wisconsin State Assemblyman and farmer, lived in Alta.
Alta is located at 42°40′19″N 95°18′17″W (42.672030, -95.304757). It is six miles from the city of Storm Lake and is approximately seven miles from Aurelia, and is located on Highway 7.
According to the United States Census Bureau, the city has a total area of 1.07 square miles (2.77 km2), all land.
As of the census of 2010, there were 1,883 people, 759 households, and 509 families residing in the city. The population density was 1,759.8 inhabitants per square mile (679.5/km2). There were 838 housing units at an average density of 783.2 per square mile (302.4/km2). The racial makeup was 91.3% White, 1.6% African American, 0.2% Native American, 1.2% Asian, 4.7% from other races, and 1.1% from two or more races. Hispanic or Latino of any race were 15.7% of the population.