Final answer:
The church founded by Joseph Smith is the Latter Day Saints (Mormons).
Step-by-step explanation:
The church founded by Joseph Smith is the Latter Day Saints (Mormons). Joseph Smith, Jr. founded this religious movement in the early 19th century in New York. The movement grew rapidly and is now one of the largest Christian denominations in the United States, with millions of members worldwide.
Learn more about Joseph Smith and the founding of the Latter Day Saints (Mormons) church