Feminine dossier · first seen 1881
Jo
Endangered
Down 99.6% from peak
Peak era
1954
Peak births
8,052
Current vitality
Rare
Peak generation
Boomer
Quick answers about Jo
How many people are named Jo?
An estimated 82,030 living Americans are named Jo.
How rare is Jo?
Jo is very rare among babies today, with 36 girls receiving the name in 2025, down 99.6% from its 1954 peak.
How old is the typical Jo?
The median age of a living American named Jo is approximately 71 years, with most bearers falling between 65 and 76 years old.
Is Jo still popular?
No. Jo is endangered as a baby name, down 99.6% from its 1954 peak with 36 births in 2025.
Where is Jo most common?
Jo has its strongest geographic signal in Texas, where it appears 5.1× more often than the national baseline.
1881Peak 19542025
Peak year
1954
Decline from peak
99.6%
2025
36
All-time
179,057
Where it lives now
Jo is most concentrated in Oklahoma — about 4.7× the national rate in the 1920s.
States where Jo is given more often than the national average — its present-day heartland.