If you put all the people living in the US into Texas how many people per acre would there be?

About 2 people per acre (1.80 to 1.84)

Texas is the second largest US state with an area of 268,581 square miles, about 261,866 square miles of which is land. This is equal to about 167,594,544 acres. Given a population of 300 million, this works out to about 1.8 people per acre. The 2010 Census counted 308 million people in the US.