Masculine dossier · first seen 1994

Kacper

Stable Decline Gradual decline from 2007

Peak era

2007

Peak births

Current vitality

Rare

Peak generation

Gen Z

Quick answers about Kacper

How many people are named Kacper?

An estimated 1,088 living Americans are named Kacper.

How rare is Kacper?

Kacper is very rare among babies today, with 11 boys receiving the name in 2025, down 87.5% from its 2007 peak.

How old is the typical Kacper?

The median age of a living American named Kacper is approximately 18 years, with most bearers falling between 13 and 21 years old.

Is Kacper still popular?

Not especially. Kacper has been declining since its 2007 peak and registered 11 births in 2025.

Where is Kacper most common?

Kacper has its strongest geographic signal in Illinois, where it appears 14.5× more often than the national baseline.

1994Peak 20072025

Peak year

2007

Decline from peak

87.5%

2025

All-time

1,102

Kacper has been in gradual retreat. The last decade averaged 3× lower than the decade before it — a slow, steady fade rather than a collapse.

Kacper peaked in 2007, when 88 boys were given the name.

In 2025, only 11 boys were given the name.

Down 87.5% from its peak.

In all, the Social Security Administration has recorded about 1,102 Americans named Kacper since 1994.

Rarity score99th percentile rare

Peak generationGen Z

StabilityEra-bound, still legible

TrajectoryGradual decline from 2007

Living profile

1,089

Estimated living Americans with this name.

Median age18

Core range13–21

Playground Density Index 0.0%

Wave type

Flash Flood

A concentrated generational spike rather than a slow classic.

Geographic heartland

Illinois

14.5× higher affinity than the national baseline.

Illinois · 2010s 14.5×

Illinois · 2000s 13.9×

New York · 2000s 4.1×