. "25.4827"^^ . . "29598"^^ . "Alpena County"@en . "1857Z"^^ . "2010Z"^^ . . "4.39003e+09"^^ . . . "1.48147e+09"^^ . . "66.0"^^ . "2.90856e+09"^^ . "Alpena County is a county located in the U.S. state of Michigan. As of the 2010 census, the population was 29,598. The county seat is Alpena. It is considered to be part of Northern Michigan.Alpena County comprises the Alpena, MI Micropolitan Statistical Area.It was founded originally in 1840 as Anomickee County."@en .