The average height of an adult woman in the United States is 63.5 inches, or about 5 feet 3.5 inches (roughly 161 cm). That number comes from the CDC’s most recent anthropometric data, collected between August 2021 and August 2023 through physical measurements of a nationally representative sample.
What That Number Actually Looks Like
At 5’3.5″, the average American woman stands about an inch shorter than the 5’4″ figure that often gets cited in casual conversation and by clothing brands. That half-inch matters more than you might think. It places most women right at the boundary between standard and petite sizing in many clothing lines, where “petite” typically starts at 5’4″ and below. If you’ve ever found that standard-length pants are slightly too long or sleeves run a bit past your wrists, you’re experiencing what it’s like to be near the statistical center of the bell curve in a retail system that rounds up.
How Height Shifts With Age
The 63.5-inch average spans all adult age groups, but women in their 20s and 30s tend to be slightly taller than women over 60. This isn’t because older generations were born shorter (though that plays a small role). The main reason is that everyone loses height as they age. Spinal discs compress, posture changes, and bone density decreases over time. Most people lose about half an inch to a full inch by their 60s, and the loss can accelerate after that. A woman who measured 5’5″ at 25 might measure closer to 5’4″ at 70.
The US Compared to Other Countries
American women aren’t especially tall by global standards. The United States ranks 58th internationally for average female height, according to the NCD Risk Factor Collaboration’s 2019 data. That might surprise people who think of Americans as generally large, but height and body weight tell very different stories. Women in the Netherlands, Latvia, Estonia, and several other Northern and Central European countries average two to three inches taller.
A century ago, the US was one of the tallest nations in the world. Since then, American women’s height has increased only modestly compared to women in other high-income countries. A major study published in eLife found that the US had the smallest gain in adult height of any wealthy nation over the past 100 years. Researchers point to differences in childhood nutrition, healthcare access during growth years, and socioeconomic inequality as likely factors. Countries with strong universal healthcare and social safety nets tended to see the biggest increases in average height over the 20th century.
What Determines Your Height
Genetics accounts for roughly 60 to 80 percent of your final adult height. If both your parents are short, you’re likely to be short. But that genetic potential only gets fully expressed under the right conditions. Nutrition during childhood and adolescence is the single biggest environmental factor. Protein intake, calcium, vitamin D, and overall caloric adequacy during growth spurts all influence how close you get to your genetic ceiling.
Chronic illness during childhood, exposure to stress, and sleep quality also play roles. Growth hormone is released primarily during deep sleep, which is one reason pediatricians pay attention to sleep patterns in growing children. Most women reach their full adult height by age 14 to 16, earlier than men, who typically keep growing until 16 to 18.
What “Average” Means in Practice
An average is just the midpoint of a distribution, not a standard you should measure yourself against. About 68 percent of American women fall within one standard deviation of the mean, which puts the majority somewhere between roughly 5’1″ and 5’6″. Being outside that range in either direction is completely normal and carries no health implications on its own.
Height does show up in some health statistics. Taller women have a slightly higher baseline risk for certain cancers, likely because they have more cells that could potentially become malignant. Shorter women face modestly higher rates of heart disease and type 2 diabetes in some studies, though those associations are tangled up with socioeconomic and nutritional factors that are hard to separate from height itself. None of these correlations are strong enough to be actionable. Your height is one data point among hundreds that shape your health profile.