As California's economy boomed and then plummeted during the latter years of the previous decade, more people (372,331) left Los Angeles County for homes elsewhere than any other county in the nation.
However, as a new U.S. Census Bureau statistical study found, more people (212,882) also moved into Los Angeles County during the 2005-2009 period than to any other county.
The study covered only movements within the nation, not migration from and to other countries.
Los Angeles, San Diego, Orange, San Bernardino and Riverside counties in Southern California and Alameda County in Northern California ranked among the national leaders in both outflow and inflow of residents.
The Southern California counties also ranked highly in what the Census Bureau calls "origin flow" -- high numbers of destinations for those moving out. Los Angeles, for instance, was second only to Maricopa County, AZ, in the number (1,091) of other counties to which the ex-Angelenos moved, indicating they scattered widely around the nation.
San Diego was 4th on that list, San Bernardino 15th, Orange County 16th and Riverside 19th.
Conversely, while Maricopa County was also No. 1 in the variation of places from which its new residents came, called "destination flow," San Diego was 3rd highest, with its new residents coming from 795 other places in the country. Los Angeles was 4th at 741 previous homes.
Edited at 11:23 a.m. to reflect that study covered only movements within U.S.