<human>:  When did the Industrial Revolution start in the United States?
<bot>: The Industrial Revolution in the United States started in the 1820s and lasted until 1850. The Industrial Revolution was a time of rapid economic growth in the United States. This period saw the development of steam engines, railroads, factories, and machines that were powered by steam and other forms of energy. It was during this period that the United States became the dominant industrial power in the world.