Immigration, emigration, and return rates among firearm deer hunters using 8 forest research areas were studied for 7 years to determine how deer densities and clear-cutting influenced the behavior and population dynamics of hunters. The areas were patrolled daily during the 1972-78 firearm deer hunting seasons. Field data were supplemented with information from mail questionnaires sent to sample hunters. About 28% of the hunters were immigrants, 64% were repeaters from the previous year, and 8% were transients. Approximately 32% would not return the following year. Characteristics, attitudes, and behaviors of these subpopulations were compared, and regression equations were developed to predict sizes of these groups. We concluded that composition, size, and behavior of deer hunter populations were sensitive to changes in deer densities and alterations in forest cover.