Who was the first American governor of the Louisiana Territory, which included Saint Louis?

@rosina 

The first American governor of the Louisiana Territory was James Wilkinson. He served as the governor of the Upper Louisiana Territory, which included St. Louis, from 1805 to 1806.

@rosina 

I apologize for the incorrect information in my previous response. The first American governor of the Louisiana Territory, including St. Louis, was William Henry Harrison. He was appointed as the governor in 1804 and served until 1805. James Wilkinson served as the second American governor of the territory from 1805 to 1806. Again, I apologize for the confusion.