One in five married households has at least one spouse who was born outside the United States, the Census Bureau reported Thursday. Three states and the District of Columbia have 12 percent or more households where one spouse is American-born and the other is not.

Immigration trends have contributed to the growing number of foreign-born Americans, and the Census Bureau found that 21 percent of married households in the United States in 2011 had at least one foreign-born spouse.

In California, Nevada, Hawaii and the District of Columbia, at least 12 percent of the married households included one American-born spouse and another foreign-born person, which the bureau calls “mixed-nativity.” The national average is 7.4 percent.

Hawaii had the highest percentage of such households, at 16 percent. Mississippi, South Dakota and West Virginia had the lowest percentages, each at 2 percent. Generally, the Mid-Atlantic and Western states had higher percentages and Midwestern and Southern states had lower percentages, except for the immigration hubs of Florida, Texas and Illinois.

Most of the foreign-born spouses — 40 percent — were born in Latin America and the Caribbean. About one in four were born in Europe or Asia.

The general trend for households broadly follows immigration and integration trends, the Census Bureau said.