Cincinnati, a beautiful city in the U.S. state of Ohio and the county seat of Hamilton County, is located north of the Ohio River at the Ohio-Kentucky border. Residents of Cincinnati are called Cincinnatians. In the early 19th century, Cincinnati was the first American boomtown in the heart of the country to rival the larger coastal cities in size and wealth. As the first major inland city in the country, it is sometimes thought of as the first purely American city. It developed initially without as much recent European immigration or influence as took place in eastern cities.