Median salary: $55,010
Having your life in danger and being responsible for other people's lives are two criteria for most stressful jobs – and the biggest factors for why police officer made the list.
"If someone is being shot at, it's easy to see why it's stressful," Lee said. "They're the first called in an emergency. They're ready at all times to step into a life-threatening situation … and have no idea what's on the other side of that closed door."
Also, researchers have found that bursts of stress, like waiting around for the call to come in and then it's go time, is more stressful than a steady level of stress, Lee said.