What is one example of the rapid growth of cities during the 1800s?

One prominent example of rapid urban growth during the 1800s is New York City, which saw its population surge from about 60,000 in 1800 to over 1 million by 1860. This dramatic increase was fueled by a wave of Immigration, particularly from Europe, along with the Industrial Revolution, which created job opportunities and attracted workers to urban areas. The city's expansion was marked by the development of infrastructure, such as transportation networks and housing, to accommodate the influx of residents. This transformation positioned New York City as a major economic and cultural center in the United States.