In 2010, the population of Garfield County in Montana was 1,206 and the county seat, Jordan, Montana, had a population of 343. What is the name of the survey that determines these populations?
Garfield County, Montana: Garfield County is a county located in the U.S. state of Montana. Garfield County, Montana:  As of the 2010 census, the population was 1,206. Jordan, Montana: Jordan is a town in and the county seat of Garfield County, Montana, United States. Jordan, Montana:  The population was 343 at the 2010 census.
census