Question: According to the 2010 census, what was the population of the county in which Huntley, Montana is located?

Context paragraphs:
Grafton Township, McHenry County, Illinois: Grafton Township is located in McHenry County, Illinois.  As of the 2010 census, its population was 53,137 and it contained 17,922 housing units.  Grafton Township includes portions of Huntley, Lake in the Hills, Algonquin, Crystal Lake, and Lakewood.

Dutton, Montana: Dutton is a town in Teton County, Montana, United States.  The population was 316 at the 2010 census.  Dutton lost population from the 2010 census by 73 people of 18% of its population.  It is also considered the Wheat Capital of Montana and is located in the Golden Triangle region.

Mankato, Minnesota: Mankato ( ) is a city in Blue Earth, Nicollet, and Le Sueur counties in the state of Minnesota.  It is the 22nd biggest city in Minnesota.  The population was 41,044 according to 2015 US census estimates, making it the fifth largest city in Minnesota outside of the Minneapolis–Saint Paul metropolitan area.  The county seat of Blue Earth County, it is located along a large bend of the Minnesota River at its confluence with the Blue Earth River.  Mankato is across the Minnesota River from North Mankato.  Mankato and North Mankato have a combined population of over 53,000, according to the 2010 census.  It completely encompasses the town of Skyline.  North of Mankato Regional Airport, a tiny non-contiguous part of the city is located within Le Sueur County.  Most of the city of Mankato is located within Blue Earth County.

Yellowstone County, Montana: Yellowstone County is the most populous county in the U.S. state of Montana.  As of the 2010 census, the population was 147,972, and a 2014 estimate put the population at 155,634.  Its county seat is Billings.  Yellowstone County is named for the Yellowstone River which roughly bisects the county from southwest to northeast.  The river in turn was named after the yellow Sandstone cliffs in what is now Yellowstone County.

Petroleum County, Montana: Petroleum County is a county located in the U.S. state of Montana.  As of the 2010 census, the population was 494, making it the least populous county in Montana and the seventh-least populous in the United States.  Its county seat is Winnett.  The Montana Legislature approved the formation of the county by separating it from Fergus County; Petroleum County was thus created on February 25, 1925, as the last of Montana's 56 counties.

Huntley, Montana: Huntley is a census-designated place (CDP) in Yellowstone County, Montana, United States.  The population was 411 at the 2000 census.  Huntley lent its name to the Huntley Project, a federal irrigation project that began delivering water to the arid district in 1907.  Today, Huntley is an eastern suburb of Billings and is located east of Shepherd and west of Worden.

Fergus County, Montana: Fergus County is a county in the U.S. state of Montana.  As of the 2010 census, the population was 11,586.  Its county seat is Lewistown.  The county was founded in 1885 and named for James Fergus, a Montana politician who was instrumental in creating the county (or, according to another source, John Fergus).

Phillips County, Montana: Phillips County is a county located in the U.S. state of Montana.  As of the 2010 census, the population was 4,253.  Its county seat is Malta.  Before February 5, 1915, Phillips County was part of Blaine County, Montana, and before 1912 both were part of Chouteau County, Montana.  It was named in honor of rancher and state senator Benjamin D. Phillips.

Groveton, Virginia: Groveton is a census-designated place (CDP) in Fairfax County, Virginia, United States.  The population was 14,598 at the 2010 census, down from 21,296 in 2000 due to a reduction in area.  Located south of the city of Alexandria, it encompasses numerous neighborhoods including Groveton, Bucknell Manor and Stoneybrooke.  Huntley Meadows Park, Fairfax County's largest park, is located in the southwest part of the CDP.

Morris County, New Jersey: Morris County is a county located in the U.S. state of New Jersey, about 25 mi west of New York City.  According to the 2010 United States Census, the population was 492,276, up from the 470,212 at the 2000 Census, As of the 2016 Census estimate, the county's population was 498,423, making it the state's 10th-most populous county, and marking a 1.2% increase from 2010.  The county is part of the New York Metropolitan Area, and its county seat is Morristown.  The most populous place was Parsippany-Troy Hills Township, with 53,238 residents at the time of the 2010 Census, while Rockaway Township covered 45.55 sqmi , the largest total area of any municipality.

Supporting paragraphs: Huntley, Montana Yellowstone County, Montana
Answer: 147,972