That's according to the Annual Stress in America Survey from the American Psychological Association. The number was slightly more than other common stressors like money and work.
Other common stress-causing issues include health care (43 percent), the economy (35 percent), trust in government (32 percent), hate crimes (31 percent) and crime (31 percent), wars/conflicts with other countries (30 percent), and terrorist attacks in the United States (30 percent).
About one in five Americans said unemployment and low wages (22 percent), and climate change and environmental issues (21 percent) caused them stress, according to the study.
The study also says adults feel conflicted about wanting to stay informed about news and their view of the media as a source of stress. 95 percent of adults say they regularly follow news, however 56 percent say doing so causes stress. 72 percent believe the media over exaggerates problems.
Women reported higher levels of stress than men.
A majority of people did positive things with their stress. Just over half of Americans say the state of the nation inspired them to volunteer or support causes they value.