<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. It was during this time that the United States became a major industrial power, and the population grew rapidly. The Industrial Revolution was the first major change in the economy of the United States. It is generally considered to have started in Great Britain and spread to the United States, and was characterized by the use of new technologies and innovations.