High Quality Content by WIKIPEDIA articles! Saco is a town in Phillips County, Montana, United States. The population was 224 at the 2000 census.Faced with the task of naming hundreds of station stops along the High Line, Great Northern Railway officials resorted to "globe trotting." According to one story, an official spun a globe and put his finger on Saco, Maine, thus giving the town its name. Another story tells that the name is a contraction of "Sacajawea." For two years, Saco boasted the Guiness world record for making the world's largest hamburger, building the 6,040-pound burger from the beef of 17 cattle in 1999.