The population of the United States in 1865 was approximately 35 million people. This period marked the end of the Civil War, which had a significant impact on the population due to the high number of casualties and the displacement of people.
Understanding the population during this time helps us grasp the scale of the war’s impact and the challenges the country faced in rebuilding and reuniting. The population growth during the 19th century was driven by factors such as immigration, westward expansion, and improvements in public health.