Aiken, 29, wrote on his Web site that his child was born in North Carolina.
"My dear friend, Jaymes, and I are so excited to announce the birth of Parker Foster Aiken," he said.
Parker is "healthy, happy and as loud as his daddy" and that Foster "is doing quite well", added the singer.
In 2003, Aiken was a runner-up on the "American Idol" second season.
Source: IB Times