New research from the Institute for Family Studies finds self-identified conservatives average significantly more children than self-identified liberals, a divide that holds up even after stripping out differences in faith, earnings, and education, and one that may say more about progressive priorities than progressives care to admit.
The numbers are stark. Conservatives average 1.4 children per person. Liberals average 1.09. That gap, roughly a third of a child, might sound modest in the abstract, but compounded across tens of millions of voters and projected over a generation, it points to a demographic current running against the American left.
The Institute for Family Studies, a nonpartisan research organization, published the findings in a report brief titled "The Ideological Fertility Divide." Researchers controlled for sex, religion, race, household income, relationship status, education, age, and parental status. The gap remained. Ken Burchfiel, an IFS research fellow, told Fox News Digital that the results cannot be chalked up to the usual explanations.
"We found that partisan differences in parenting attitudes held up even when controlling for age, sex, race, household income, relationship status, education, religion, and parental status. That means that these differences aren't merely a result of diverging faith preferences or income gaps."
In other words, something beyond church attendance and paycheck size is driving the divide. And the researchers think they know at least part of the answer.
Burchfiel's hypothesis centers on geography. Democrats cluster in dense urban areas, places where a two-bedroom apartment can cost more than a mortgage in the suburbs, where playgrounds are scarce, and where the daily rhythm of life rarely puts adults in contact with families raising young children.
The effect, he argues, is self-reinforcing. Fewer kids in a neighborhood means fewer visible models of parenthood, which makes the whole enterprise feel more daunting to people who are already on the fence.
"If you live in a small apartment in a major city, you probably are more likely to see parenting as very stressful and difficult; after all, raising a child is more expensive and complicated in the heart of an urban area than in the suburbs."
Burchfiel added that adults in major cities may have fewer daily opportunities to interact with parents and children, and that those opportunities could continue to decline as cities lose young families. It is a feedback loop: fewer children make cities less child-friendly, which discourages the next round of would-be parents from starting families at all.
The IFS research also found that liberals report significantly higher levels of concern about parenting and about their own mental health, a finding that dovetails with broader cultural trends on the left. The quiet demographic shift surrounding delayed parenthood has been building for years, and the IFS data suggests ideology is now a meaningful variable in that shift.
The Atlantic's Olga Khazan tackled the same research in an article titled "Another Big Difference Between Liberals and Conservatives." Khazan, a staff writer, did not dispute the numbers. Instead, she framed the divide as a natural consequence of different value systems.
"Having children, particularly lots of children, has become a bit right-coded, as the kids say. Americans and Europeans who identify as leftist or liberal tend to have fewer children than those who identify as conservative or right-leaning."
Khazan pointed to Pew Research Center polling showing that Republicans were more likely than Democrats to say having children was "highly important" for living a fulfilling life. Democrats, meanwhile, were more likely to say that creative activities were "one of the most important things" to them.
Her conclusion was blunt: liberals may simply be less willing to choose parenthood when it competes with career, friendships, travel, and other pursuits. She also suggested that liberal anxiety extends beyond the practical, reaching into systemic worries over climate change, reproductive healthcare access, and what she described as therapy-driven fears of repeating family trauma.
That framing is revealing. When one side of the political spectrum treats parenthood as a fulfilling calling and the other treats it as a competing priority to be weighed against travel and creative projects, the fertility numbers follow logically. The IFS data does not prove causation, but the attitudinal gap is hard to dismiss as coincidence.
The ideological fertility gap lands against a backdrop of falling birth rates nationwide. CDC data published in April 2026 showed that provisional U.S. births decreased by 1 percent from 2024 to 2025. Both the overall birth numbers and the general fertility rate have dropped, a trend that predates any single administration but that carries long-term consequences for the labor force, entitlement programs, and national vitality.
The Trump administration has positioned itself squarely on the pro-family side of the ledger. President Trump signed an executive order expanding access to in vitro fertilization, and the administration proposed a $5,000 "baby bonus" for mothers giving birth, a direct financial incentive aimed at reversing the decline. Vice President JD Vance has urged the country to have more babies, a message that drew mockery from progressive commentators but that aligns with the IFS findings about conservative attitudes toward parenthood.
The policy push reflects a straightforward calculation: if the country needs more children, and if conservatives already value parenthood more highly, then removing barriers, financial, medical, cultural, is the logical move. The Vance family's own public embrace of parenthood has served as a cultural counterweight to the progressive framing of children as a burden or a risk.
Fox News Digital's reporting highlighted another dimension of the divide: conservative women are more likely to have children before launching their careers, rather than delaying parenthood until professional milestones are met. That sequencing, family first, career second, runs against the grain of the advice that elite institutions have offered young women for decades.
Katherine Boyle, co-founder of American Dynamism, appeared on Fox News to discuss the findings. The broader conversation around conservative views on women's roles in work and family life has grown louder in recent years, and the IFS data gives that conversation an empirical foundation.
The left's response to these numbers has been predictable: reframe the gap as a lifestyle choice deserving of respect, not a problem requiring a solution. Khazan's Atlantic piece did exactly that, treating the liberal preference for fewer children as a rational response to competing priorities rather than as a cultural failure with demographic consequences.
But the consequences are real regardless of how they are framed. A political movement that produces fewer children is a political movement that depends more heavily on persuasion and conversion to sustain itself. Conservatives, by contrast, are building families, and those families tend to pass along the values that produced them.
The IFS research does not claim that every conservative family is thriving or that every liberal who delays parenthood is making a mistake. What it does show, after controlling for every obvious confounding variable, is that ideology itself correlates with how Americans think about children, and whether they have them. Progressives have spent years insisting that personal choices are political. On this one, the data agrees with them, just not in the direction they would prefer.
A movement that treats children as a competing priority rather than a central purpose will eventually discover that demography is not a lifestyle preference. It is a verdict.