Sex Ratio by U.S. County (2000 – 2017)
Between 2000 and 2017, the male population grew slightly faster than the female population. This decline resulted in the sex ratio (males per 100 females) increasing from 97.1 in 2000 to 98.7 in 2017.
Despite this increase, the sex ration in the U.S. decreased during most of the twentieth century. After a peak of 106.2 in 1910, the sex ratio declined to a low of 94.5 in 1980. This long decline resulted mainly from the relatively larger reduction in female mortality rates during the period. The sex ratio then increased between 1980 and 1990, as male death rates declined faster than female death rates and as more male immigrants than female immigrants entered the country.
Male to female sex ratio
The sex ratio is calculated as the number of males per 100 females.
Below is the animated map of the sex ratio by U.S. county from 2000 to 2017.
U.S. Counties With the Most Men (2017)
- Crowley County (Colorado) – 276 men to 100 women
- Forest County (Pennsylvania) – 218 men to 100 women
- Aleutians East Borough (Alaska) – 213 men to 100 women
- Aleutians West Census Area (Alaska) – 199 men to 100 women
- Garza County (Texas) – 190 men to 100 women
- Bent County (Colorado) – 190 men to 100 women
- West Feliciana Parish (Louisiana) – 190 men to 100 women
- Union County (Florida) – 190 men to 100 women
- Chattahoochee County (Georgia) – 190 men to 100 women
- Brown County (Illinois) – 187 men to 100 women
- Wheeler County (Georgia) – 185 men to 100 women
- Pershing County (Nevada) – 181 men to 100 women
- Lake County (Tennessee) – 177 men to 100 women
- Stewart County (Georgia) – 175 men to 100 women
- Jones County (Texas) – 170 men to 100 women
- DeKalb County (Missouri) – 169 men to 100 women
- Greensville County (Virginia) – 167 men to 100 women
- Lassen County (California) – 167 men to 100 women
- North Slope Borough (Alaska) – 165 men to 100 women
- Powell County (Montana) – 164 men to 100 women
U.S. Counties With the Most Women (2017)
- Pulaski County (Georgia) – 75 men to 100 women
- Livingston County (Missouri) – 78 men to 100 women
- Summers County (West Virginia) – 82 men to 100 women
- Franklin city (Virginia) – 83 men to 100 women
- Audrain County (Missouri) – 84 men to 100 women
- Macon County (Alabama) – 84 men to 100 women
- Sumter County (Alabama) – 84 men to 100 women
- Emporia city (Virginia) – 84 men to 100 women
- Fluvanna County (Virginia) – 84 men to 100 women
- Staunton city (Virginia) – 85 men to 100 women
- Marion County (South Carolina) – 85 men to 100 women
- Randolph County (Georgia) – 85 men to 100 women
- Petersburg city (Virginia) – 85 men to 100 women
- Martinsville city (Virginia) – 85 men to 100 women
- Dallas County (Alabama) – 86 men to 100 women
- Fredericksburg city (Virginia) – 86 men to 100 women
- Dougherty County (Georgia) – 86 men to 100 women
- Coahoma County (Mississippi) – 86 men to 100 women
- Danville city (Virginia) – 86 men to 100 women
- Galax city (Virginia) – 86 men to 100 women
- Edgecombe County (North Carolina) – 86 men to 100 women
- Niobrara County (Wyoming) – 86 men to 100 women
- Colonial Heights city (Virginia) – 87 men to 100 women
- Bolivar County (Mississippi) – 87 men to 100 women
- Early County (Georgia) – 87 men to 100 women
www.vividmaps.com
Data: census.gov
Related posts:
– Leading minority group by U.S. county (1990 – 2017)
– Leading group by U.S. county (1990 – 2017)
– American Indian Population by County (1990 – 2017)
– U.S. Asian Population by County (1990 – 2017)
– U.S. Black Population by County (1990 – 2017)
– U.S. Hispanic Population by County (1990 – 2017)
– U.S. Non-Hispanic White Population by County (1990 – 2017)
– U.S. Population Density
Fantastic map. Almost all of these counties with these extremes tend to be poorer, rural, and in “flyover” states.
Women really outnumber men in many counties that are predominantly Black.
Men really outnumber women were there is oil, mining and forests… North Dakota, Washington, Texas, Alaska
Shouldn’t we a little concerned that the gender birth ratio is vastly different in the last 20 years than the last 200? Male: female birth ratio historically has always been male leading..,likd in all of history. Over time, males die younger and it becomes even. Men have specific genetic issues that women are insulated from simply by having 2 X chromosomes. Sex -linked diseases are almost absent in women. So for no one to be asking “why is there a 10% shift in the birth gender” is as concerning as the fact there’s a 10% shift in this ratio… this doesn’t just happen naturally.