The U.S. flag had 38 stars from July 4, 1877 until July 4, 1890.
When Thomas Jefferson was president there were fifteen stars ont the flag.
The US flag had 31 stars while Pierce was President.
20 stars
There were 50 states, and 50 stars on the flag, when Jimmy Carter became president.
36
50.
There were 15 stars in the American flag while George Washington was president.
13 stars for 13 states.
50 (fifty)
The U.S. flag had 48 stars from July 4, 1912 until July 4, 1959.
36
13