Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.Quincy (/'kw?nsi/ kwin-see), known as Illinois's "Gem City," is a city on the Mississippi River and the county seat of Adams County, Illinois, United States.[3] As of the 2010 census the city held a population of 40,633, up from 40,366 in 2000. During the 19th Century, Quincy was a thriving transportation center as riverboats and rail service linked the city to many destinations west and along the river. It was once Illinois' second-largest city, surpassing Peoria in 1870.[4] The city holds several historic districts, including the Downtown Quincy Historic District and the South Side German Historic District showcasing the architecture of Quincy's many German immigrants from the late-19th century.