Source: Gallup
American parents with kids under 18 still in the house are happier than those without kids and the rest of the country.

According to a 2014 Gallup poll, American parents are happier than non-parents. The poll found 84.1 percent of Americans “smiled or laughed a lot” when they had children under the age of 18 living at home. About 79 percent of adults without kids said the same.

“The parenting experience of having children living at home is filled with many moments of joy, typically driven by love and buttressed by the satisfaction that comes with children's growth and successes as students, artists, athletes, friends, and citizens — inside and outside the home,” according to Gallup.

The poll also found that those with kids are more stressed out than those without. About 45 percent of parents reported being stressed, while only 37 percent of non-parents said the same.

But the bad times can be worth it. According to a study from the Pew Research Center, parents find raising kids to be a highly stressful, yet "very meaningful" task. They feel rewarded for spending time with their kids, despite the stress it may bring, Pew reported.

Take a look at the Gallup findings in the graphic below: