Einwanderung in die Vereinigten Staaten
Immigration to the United States from Spain was minimal but steady during the first half of the nineteenth century, with an increase during the 1850s and 1860s resulting from the social disruption of the Carlist civil wars. Much larger numbers of Spanish immigrants entered the country in the first quarter of the twentieth century—27,000 in the first decade and 68,000 in the second—due to the same circumstances of rural poverty and urban congestion that led other Europeans to emigrate in that period, as well as unpopular wars. The Spanish presence in the United States declined sharply between 1930 and 1940 from a total of 110,000 to 85,000. Many immigrants moved either back to Spain or to another country.