The average height of an American woman is 63.5 inches, or about 5 feet 3.5 inches (1.63 meters). This figure comes from the CDC’s most recent anthropometric data, collected between August 2021 and August 2023 through the National Health and Nutrition Examination Survey.
How Height Changes With Age
That 63.5-inch average reflects all adult women, but height varies meaningfully across age groups. Younger women tend to be taller. National survey data shows women aged 18 to 24 average about 64.3 inches (5 feet 4.3 inches), while women 65 and older average around 62.3 inches. That’s a full two-inch difference between the youngest and oldest adult groups.
This drop isn’t because older women were always shorter. Some of it reflects generational improvements in nutrition and healthcare, but most of it is physical. Spinal discs compress over decades, and the vertebrae themselves can lose density, gradually reducing standing height. The decline becomes noticeable after about age 45, accelerating after 55.
What Determines Your Height
About 80 percent of your adult height is determined by the DNA you inherited. Height is polygenic, meaning hundreds of gene variants each contribute a small amount rather than one or two genes controlling the outcome. This makes it nearly impossible to predict exactly how tall a child will be based on parental height alone.
The remaining 20 percent comes from environment, and it matters more than it might sound. Childhood nutrition, exposure to infectious disease, and access to healthcare all shape how close someone gets to their genetic potential. A mother’s nutrition during pregnancy, whether she smoked, and her exposure to hazardous substances also play a role. Socioeconomic factors like income, education, and occupation feed into these conditions indirectly. Studies on immigrant families have found that moving to a country with better food access and healthcare can meaningfully increase height in the next generation, suggesting that some height differences between populations are environmental, not genetic.
Where American Women Rank Globally
At 1.63 meters, American women fall solidly in the middle of the global range. The tallest women in the world live in the Netherlands and Montenegro, where the average reaches 1.70 meters (about 5 feet 7 inches). The shortest averages are found in Guatemala at 1.51 meters (just under 5 feet), followed closely by Nepal, Bangladesh, and East Timor at 1.52 meters.
A century ago, the United States was one of the tallest nations on Earth. That’s no longer the case. A large-scale analysis published in eLife tracked height trends across countries and found that the U.S. has had the smallest gain in height of any high-income country over the past 100 years. Northern European nations and several Asian countries like Japan and Singapore saw larger increases. One proposed explanation is that countries where height stalled, including the U.S., simultaneously experienced large increases in body mass index, suggesting that dietary quality and overall health conditions diverged from those in nations that kept getting taller.
Why This Number Matters for Everyday Design
Average height data directly shapes the products you use every day. Ergonomic designers use measurements like seated knee height, hip breadth, and eye level to set dimensions for office chairs, desks, car interiors, and aircraft cockpits. These designs aim to fit a target range of the population, typically the 5th through 95th percentile, so that most people can sit comfortably, reach controls, and see over dashboards without strain.
Clothing sizing relies on the same anthropometric surveys. Rather than simply scaling down men’s patterns, designers use body dimensions specific to women, including waist-to-hip ratios, arm length, and torso proportions, to create sizing systems. When averages shift even slightly over time, entire size charts eventually get recalibrated. If you’ve ever noticed that a “medium” today fits differently than it did 20 years ago, population-level height and weight changes are part of the reason.