height after 20

The average height for adult women varies around the world. In the United States, the average woman is a little under 5 feet 4 inches tall at 63.7 inches (161.8 centimeters). This data is reported by the National Health and Nutrition Examination Survey (NHANES), which was conducted from 2011 to 2014.

The average height of women in the U.S. has some variation by ethnicity.

Here are the categories and statistics reported on that survey:
Non-Hispanic white women: 64.1 inches (162.9 centimeters)
Non-Hispanic black women: 64.2 inches (163.0 centimeters)
Non-Hispanic Asian women: 61.8 inches (157.0 centimeters)
Hispanic (includes Mexican American) women: 62.0 inches (157.5 centimeters)
Mexican American women: 61.9 inches (157.3 cm)

Average Height Statistics Worldwide

Various unofficial sources say the average adult female height worldwide is 5 feet 3 inches or 5 feet 4 inches, without saying how they arrived at that answer. It isn't easy to pin down, as each country has its own statistics, sampling methods, and reports.

Any overall change in the height of women in China and India, each with about 18 percent of the world population, could change the worldwide average significantly. Here are some trends in the height of women around the world:
In many European countries, such as the Netherlands, the average woman is 5 feet 6 inches tall.

In many other countries. including India and various countries in Asia, Southeast Asia, Central, and South America, the average woman's height is 5 feet 0 inches or less. Women in India have barely been increasing in height over the past few decades.
Various reports on the Chinese population list the average woman's height between 61.5 and 63.0 inches. The average height has been increasing for girls by 1.2 inches (3.0 centimeters) or more, which predicts taller population averages for China in the years to come.