BabyNameLens · Girl names · Boy names
“Variant of Colby — Coal town, or Koli's settlement” — Old Norse origin
Boy's name · #1225 in the US (2025) · 2000s
Kolby's best rank, #359, came in 2001; it has settled back to #1225 today. Roughly 12,000 boys have been named Kolby since 1968. Together with its spelling variant Colby (#615), Kolby would rank around #486 with about 620 births last year — the newborns split about 73/27 between Colby and Kolby.
Around the world: about 1 in 8,400 boys in Canada (2024) · about 1 in 14,000 boys in England & Wales (2025).
Appears in 2020-2025 birth records of 16 states. See the full state-by-state map on this page.
Among 16 notable people named Kolby:
Sports figures appear 3.63× more often than among typical names — e.g. Kolby Allard, American baseball player.
Similar names: Colby · Skylar · Kolbe · Coby · Dayton · Colten
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