Ben Blatt put together a fascinating set of maps at Slate using data from the U.S. Census Bureau’s American Community Survey. Spanish is the second most-commonly spoken language in Iowa homes, as in most of the U.S. I was surprised to see that once English and Spanish are excluded, German is the most commonly-spoken language in Iowa homes. I assume the Amish population in southeast Iowa accounts for that finding, though Blatt’s map shows German as the third-most spoken language in a lot of states that don’t have a significant Amish community, to my knowledge.

Since Asian-Americans are the fastest-growing demographic group in Iowa, I would have expected some Asian language to rank higher than German on the Census Bureau’s survey. (Vietnamese was the result for Nebraska, while Hmong was the result for Minnesota.) Apparently Iowa doesn’t have a large enough immigrant community from any one Asian country to exceed the number of German-speakers.

Incidentally, Blatt’s other maps indicate that in Iowa, Fox is the most commonly-spoken Native American language, Norwegian is the most commonly-spoken Scandinavian language, Hindi is the most commonly-spoken Indo-Aryan language, and Cushite is the most commonly-spoken African language–though I think “Cushite” refers to a group of east African languages, rather than one distinct language.