Feminine dossier · first seen 1880
Lou
Endangered
Down 95.7% from peak
Peak era
1954
Peak births
1,495
Current vitality
Rare
Peak generation
Boomer
Quick answers about Lou
How many people are named Lou?
An estimated 11,539 living Americans are named Lou.
How rare is Lou?
Lou is uncommon among babies today, with 65 girls receiving the name in 2025, down 95.7% from its 1954 peak.
How old is the typical Lou?
The median age of a living American named Lou is approximately 70 years, with most bearers falling between 63 and 73 years old.
Is Lou still popular?
No. Lou is endangered as a baby name, down 95.7% from its 1954 peak with 65 births in 2025.
Where is Lou most common?
Lou has its strongest geographic signal in Tennessee, where it appears 4.3× more often than the national baseline.
1880Peak 19542025
Peak year
1954
Decline from peak
95.7%
2025
65
All-time
34,109
Where it lives now
Lou is most concentrated in Oklahoma — about 3.8× the national rate in the 1940s.
States where Lou is given more often than the national average — its present-day heartland.