Question: How many people lived in the county seat of the county in Montana named after Abraham Lincoln?

Context paragraphs:
Lincoln County, Idaho: Lincoln County is a county located in the U.S. state of Idaho.  As of the 2010 census, the population was 5,208.  The county seat and largest city is Shoshone.  The county is named after President Abraham Lincoln.  The Idaho Territory was created in 1863, during the Lincoln Administration of 1861–65.

Abraham Lincoln: The Hoosier Youth: Abraham Lincoln, The Hoosier Youth is a heroic bronze sculpture by American artist Paul Manship and was commissioned in 1928 by the Lincoln National Life Insurance Company for its headquarters in Fort Wayne, Indiana.  The statue is 12.5 ft tall and sits atop a pedestal designed by architect Benjamin Wistar Morris and a granite base.  The sculpture depicts a youthful Abraham Lincoln during the time he lived in Indiana.  The Lincoln figure wears a handmade shirt, buckskin trousers, and boots.  He is seated on a tree stump and holds a book.  An ax leans against his leg and a dog is seated beside him.  Manship also sculpted four bronze allegorical bas reliefs, one for each side of the pedestal, to represent traits associated with Lincoln: "Charity, Fortitude, Justice" and "Patriotism."  The statue was dedicated on 16 September 1932.

Lincoln County, Arkansas: Lincoln County is located between the Arkansas Timberlands and Arkansas Delta in the U.S. state of Arkansas.  It is also within the Pine Bluff metro area, and on the outer edge of the Central Arkansas region.  The county is named for Abraham Lincoln, the 16th President of the United States.  Created as Arkansas's 65th county on March 28, 1871, Lincoln County has three incorporated cities, including Star City, the county seat and most populous city.  The county contains 46 unincorporated communities and ghost towns, Cane Creek State Park at the confluence of Cane Creek and Bayou Bartholomew, and nine listings on the National Register of Historic Places to preserve the history and culture of the county.

Brookville, Pennsylvania: Brookville is a borough in Jefferson County in the U.S. state of Pennsylvania, 100 miles (161 km) northeast of Pittsburgh.  2,472 people lived in Brookville in 1900, and 3,003 people lived there in 1910.  The population was 4,230 at the 2000 census.  Founded in 1830, it is the county seat of Jefferson County

Mordecai Lincoln House (Springfield, Kentucky): The Mordecai Lincoln House is a historic house located in Washington County, Kentucky, 6 mi north of Springfield, Kentucky.  It was the home of Mordecai Lincoln, brother of Thomas Lincoln, the father of the 16th President of the United States Abraham Lincoln.  It is the only house owned by a member of Abraham Lincoln's family that still stands in Kentucky.  It is across KY 528 from Lincoln Homestead State Park.

Abraham Lincoln High School (Des Moines, Iowa): Abraham Lincoln High School, usually referred to simply as Lincoln High School or Lincoln, is a secondary school located in Des Moines, Iowa, United States.  It is one of five secondary schools under the district of the Des Moines Public Schools, and was named after the 16th United States president Abraham Lincoln.  The school sports team is named after one of President Lincoln's nicknames, the "Rail Splitter" (the "Lincoln Railsplitters" or "Rails").  Their mascot is typically a senior at the school or a recent alumni dressed up as Abraham Lincoln.  The school is known as the Pride of the South Side.

Lincoln County, Montana: Lincoln County is a county located in the U.S. state of Montana.  As of the 2010 census, the population was 19,687.  Its county seat is Libby.  The county was founded in 1909 and named for President Abraham Lincoln.

Lincoln County, Washington: Lincoln County is a county located in the U.S. state of Washington.  As of the 2010 census, the population was 10,570, making it the fifth-least populous county in Washington.  The county seat and largest city is Davenport.  The county was created out of Whitman County on November 24, 1883 and is named for Abraham Lincoln, 16th President of the United States.

Lincoln College (Illinois): Lincoln College (chartered Lincoln University) is a private, independent liberal arts college located in Lincoln, Illinois.  Lincoln College is a hybrid college offering both two-year and four-year degree programs for its students.  Lincoln College was established in 1865 by the Cumberland Presbyterian Church, but is now independent and has no formal church affiliation.  There were a few sites that were looked at as possibilities, and in December 1864, the site of Lincoln was selected.  Due to the Civil War, the denomination wanted to create a college in the North because the denomination's other schools were located in the South.  At this same time a movement started in the new community of Lincoln to start a college.  On February 6, 1865, the Illinois General Assembly granted the charter that established the university.  President Lincoln was aware the school would be named after him.  Lincoln University was the first institution named for Abraham Lincoln and the only one during his lifetime.  The groundbreaking for University Hall, the first college building, was held on the birthday of Abraham Lincoln, which was six days after the charter had been granted.  By September 1866, University Hall's construction was completed.  In November 1866, the college opened its doors to men and women alike.  In 1868, there were three people who received their degrees.

Libby, Montana: Libby is a city in and the county seat of Lincoln County, Montana.  The population was 2,628 at the 2010 census.

Supporting paragraphs: Lincoln County, Montana Libby, Montana
Answer: 2,628