On average, more than 6 million deer are killed by hunters in the United States per year, while approximately 10 million Americans hunt deer each year. In addition, more than 1.5 million deer are killed by automobiles every year.
Although hunters may kill 6 million deer, an estimated 12 million new fawns are born a few months after the season. The deer population has exploded over the past 100 years, numbering well over 30 million as of 2015. Some areas even have populations as high as 100 deer per square mile. Prior to this, the number of deer in the United States was dramatically low during the 1800s, and by the 1920s, deer were practically extinct in many states.