Question: George Emanuel Toomey's hometown was the largest city in what county?

Context paragraphs:
Rome, Georgia: Rome is the largest city in and the county seat of Floyd County, Georgia, United States.  Located in the foothills of the Appalachian Mountains, it is the principal city of the Rome, Georgia, Metropolitan Statistical Area, which encompasses all of Floyd County.  At the 2010 census, the city had a population of 36,303.  It is the largest city in Northwest Georgia and the 19th largest city in the state.

McMinnville, Oregon: McMinnville is the county seat and largest city of Yamhill County, Oregon, United States.  According to "Oregon Geographic Names", it was named by its founder, William T. Newby (1820–1884), an early immigrant on the Oregon Trail, for his hometown of McMinnville, Tennessee.  As of the 2010 census, the city had a population of 32,187.

Swansea: Swansea ( ; Welsh: ' ] ), officially known as the City and County of Swansea"' ( ), is a coastal city and county in Wales.  It is the second largest city in Wales after Cardiff, and the twenty-fifth largest city in the United Kingdom.  Swansea lies within the historic county boundaries of Glamorgan and the ancient Welsh commote of Gŵyr.  Situated on the sandy South West Wales coast, the county area includes the Gower Peninsula and the Lliw uplands.  According to its local council, the City and County of Swansea had a population of 241,300 in 2014.  The last official census stated that the city, metropolitan and urban areas combined concluded to be a total of 462,000 in 2011, making it the second most populous local authority area in Wales after Cardiff.  During its 19th-century industrial heyday, Swansea was a key centre of the copper industry, earning the nickname 'Copperopolis'.

Oakland, California: Oakland is the largest city and the county seat of Alameda County, California, United States.  A major West Coast port city, Oakland is the largest city in the East Bay region of the San Francisco Bay Area, the third largest city overall in the San Francisco Bay Area, the eighth largest city in California, and the 45th largest city in the United States, with a population of 419,267 as of 2015 .  It serves as a trade center for the San Francisco Bay Area; its Port of Oakland is the busiest port in the San Francisco Bay, the entirety of Northern California, and the fifth busiest in the United States of America.  The city was incorporated in 1852.

Casselton, North Dakota: Casselton is a city in Cass County, North Dakota, United States.  The population was 2,329 at the 2010 census.  making it the twentieth largest city in North Dakota.  Casselton was founded in 1876.  The city is named in honor of George Washington Cass, a president of the Northern Pacific Railway, which established a station there in 1876 to develop a town for homesteaders.  Casselton is the hometown of five North Dakota governors.

Manchester, New Hampshire: Manchester is the largest city in the U.S. state of New Hampshire, the eleventh largest city in New England, and as of 2016 the largest city in northern New England, an area comprising the states of Maine, New Hampshire, and Vermont.  As of the 2010 census, the city had a population of 109,565, and its estimated 2016 population was 110,506.  It is located in Hillsborough County along the banks of the Merrimack River, which divides the city into eastern and western sections.  Manchester is near the northern end of the Northeast megalopolis.  It was first named by the merchant and inventor Samuel Blodget (after whom Samuel Blodget Park and Blodget Street in Manchester's North End are named).  Blodget's vision was to create a great industrial center similar to that of the original Manchester in England, which was the world's first industrialized city.

George Toomey: George Emanuel Toomey (October 17, 1873 – c. 1932) was an American football coach.  He served as the head football coach at Colorado Agricultural College—now known as Colorado State University for one season, in 1900, compiling a record of 1–3.  He forced to resign following a scandal in 1901 regarding his playing a professional player.  Toomey graduated from Denver University in 1898, where he was a member of the baseball team, the Beta Theta Pi fraternity, and leader of the glee club.  His hometown was Cottonwood Falls, Kansas, and he had previously attended Baker University.  In 1900, Toomey had also been named professor of Oratory at Colorado State.

Waterbury, Connecticut: Waterbury (nicknamed "The Brass City") ( ) is a city in the U.S. state of Connecticut on the Naugatuck River, 33 miles (45 minutes) southwest of Hartford and 77 miles (90 minutes) northeast of New York City.  Waterbury is in New Haven County, Connecticut.  As of the 2010 census, Waterbury had a population of 110,366, making it the 10th largest city in the New York Metropolitan Area, 9th largest city in New England and the 5th largest city in Connecticut.

Cottonwood Falls, Kansas: Cottonwood Falls is the largest city and county seat of Chase County, Kansas.  As of the 2010 census, the city population was 903.

Great Falls, Montana: Great Falls is a city in and the county seat of Cascade County, Montana, United States.  The 2015 census estimate put the population at 59,638.  The population was 58,505 at the 2010 census.  It is the principal city of the Great Falls, Montana Metropolitan Statistical Area, which encompasses all of Cascade County and has a population of 82,278.  Great Falls was the largest city in Montana from 1950 to 1970, when Billings surpassed it.  Great Falls remained the second largest city in Montana until 2000, when it was passed by Missoula.  Since then Great Falls has been the third largest city in the state.

Supporting paragraphs: George Toomey Cottonwood Falls, Kansas
Answer: Chase County