New numbers from the U.S. Census Bureau show modest population growth in Missouri and Kansas.

St. Charles led all Missouri counties with a gain of about 3,700 residents, followed by Greene, Boone, Clay and Jackson counties.

The Fort Riley area ranking as the fastest-gaining region in Kansas.

The data show Missouri’s population grew by about 13,000 to 6,021,988 in the one-year period ending July 1, a growth rate of 0.2 percent.

St. Louis County gained more than 1,100 residents to climb back over the 1 million mark. St. Louis city lost nearly 400 residents. Jasper County, still recovering from the devastating Joplin tornado of two years ago, lost almost 2,600 people.

Kansas gained about 15,500 residents from July 2011 to July 2012, bringing its population to almost 2.9 million. The projected growth was 0.5 percent. The Census Bureau also said 40 of the state’s 105 counties gained population over the year. Holt County in northwest Missouri had the highest percentage drop, losing 3.3 percent of its residents.

The Census numbers are subject to revision.