The United States, like most industrialized nations, has experienced rapid population aging in the last few decades. The social changes associated with population aging resulted in the emergence of a period in later life called the third age, a period which occurs after retirement and prior to the onset of disability. The depiction of third agers as healthy, retired, and resource-rich has led to a growing expectation that they the capacity to remain productive in society through volunteerism. This study examined the extent to which the characteristics associated with the third age shape whether and how much older adults volunteer in the United States. Results from logistic regression models indicate that third age characteristics, including having adequate economic, human, health, and temporal capital, are associated with volunteer behaviors, and that having access to a social network also increases the likeliness of volunteering. These characteristics suggest that possession of and access to these resources is important to having the ability to "choose" to engage in voluntary activities. Furthermore, if the United States seeks to increase participation of older adults in such activities, it is important to facilitate opportunities for elders to obtain access to the resources needed to volunteer and support opportunities for older adults and society to mutually benefit from such engagement.