Knox is a moderately popular boys' name in United States, ranking #220 in 2021 with 1,737 recorded births. The name reached its all-time peak in 2022 with 1,900 births ranking #199. Since 1996, the popularity has increased by 10,117.6%. In 2021, approximately 1 in every 1,006 boys born was named Knox. FALLING Recent data shows the name is currently falling.