The state's No. 2 county, long eclipsed by No. 1, is catching up on one big bragging-rights metric: rate of growth.
Ramsey County in this decade is managing to do something it hasn't done since at least World War II — add residents at a rate nearly identical to that of Hennepin County, its much bigger neighbor.
Moreover, forecasts call for that trend to continue for decades. A key reason, according to demographers, is Ramsey County's status as a destination for immigrants, often youthful and ready to have bigger families than U.S. natives.
"I think I shocked some city staff in St. Paul not long ago when they asked me about a need to prepare for an aging population," State Demographer Susan Brower said. "And my response was, 'You know, you're pretty young here!' They'd heard about the Age Wave and thought it applies to all."
Estimates for 2015 put Hennepin County's population at 1.2 million, and Ramsey County's at 534,000. But the rate of growth for the two counties so far this decade is only fractionally different — Hennepin up 6.9 percent, Ramsey up 6.3 percent — according to updates this spring.
Throughout that time, Ramsey has led in persons per household.
Both counties' immigrant share rose from 2005 to 2015, but Ramsey grew more — from 11.3 percent foreign-born to 15.3 percent — and claimed a bigger share than Hennepin.
Youth and room to grow
Ramsey County, and notably St. Paul, is younger than Hennepin County. Ramsey's median age is 34.8, versus 36.2 for Hennepin.