As Many Midwest Cities Slump, Sioux Falls Soars

SIOUX FALLS, S.D.—When Ruth Sturm told East Coast friends she was moving here, many had to ask where it was.

“I got a lot of, ‘Do people live in teepees?’” said the 26-year-old digital strategist, who is among the 20,000 new people to settle in this once-sleepy city of 178,500 in the past five years.

Despite the sometimes harsh…