"1.83889e+06"^^ . . . "-5" . "0.0"^^ . "1.84e+06"^^ . "641" . . . . "34"^^ . "18.4943"^^ . "-6" . "18.5"^^ . "1.83889e+06"^^ . . "Carbon is a city in Douglas Township, Adams County, Iowa, United States. The population was 34 at the 2010 census.Note that other places in Iowa have been named Carbon. There was a Carbon Post Office in Davis County, 6 miles south of Ottumwa, that operated for less than a year in 1881. There was also a Carbon Post Office in Webster County, 3 miles south-east of Fort Dodge, that operated from 1870 to 1872. A post office on the latter location was known as Gypsum from 1902 to 1905."@en . "1.84e+06"^^ . . "345.948"^^ . "Carbon, Iowa"@en . "50841" . "346.0"^^ . .