"Williamson is a city in Lucas County, Iowa, United States. The population was 152 at the 2010 census."@en . "Williamson, Iowa"@en . "830000.0"^^ . "50272" . "828796.0"^^ . . "830000.0"^^ . "-5" . "641" . . . . "-6" . "315.0"^^ . "183.4"^^ . "152"^^ . "314.858"^^ . . . . "183.399"^^ . "828796.0"^^ . "0.0"^^ .