Cobb County is home to 38 of the fastest-growing businesses in America and their $1,602,505,515 of revenue last year.

The AJC analyzed data from Inc. Magazine and found that Georgia had 232 of the fastest-growing companies in America, which puts the state in sixth place.

Inc. creates the ranking of 5,000 businesses by having the company provide details including its percentage growth of a annual revenue over a three-year period.

Castle Medical was Cobb's highest-ranked business coming in at 42. The company listed its revenue last year at $49 million and employs 302 people.

Fulton County had the most Georgia businesses listed with 126. Cobb placed second. Next Gwinnett County at 26 companies. And DeKalb placed fourth with 11.

Those four counties make up 86 percrent of the fastest-growing businesses in Georgia.

When added up, the 232 Georgia businesses brought in $10,446,218,876 and employed 56,419 people. For comparison: California — the top money-maker and employer — had its 667 businesses reel in $25,837,744,127 and employ 243,293 people.

To ensure accuracy, the magazine has a revenue verification process that could include audit paperwork or a corporate tax return. In 1982, Inc. introduced the Inc. 500 list of the fastest-growing privately held companies in the United States. In 2007, the list grew to 5,000. The list is featured in the magazine’s September issue.

—Jonathan Cox, web developer with the AJC, contributed to this piece.