K
- Kanawyers, California – Peter Apoleon Kanawyer (founder)
- Karlo, California – Frank De Carlow (early settler)
- Karnes City, Texas – Henry Karnes (Texas patriot)
- Kasson, California – Amasa C. Kasson (investor in the site)
- Keene, California – James R. Keene (financier)
- Keene, New Hampshire – Sir Benjamin Keene (English minister to Spain and West Indies trader)
- Keenesburg, Colorado – Les Keene (settler)
- Keizer, Oregon – Thomas Dove Keizur
- Kellogg, Idaho – Noah Kellogg (prospector)
- Kelsey, California – Benjamin Kelsey (founder)
- Kelso, California – Napoleon B. Kelso (first postmaster)
- Kenedy, Texas – Mifflin Kenedy (rancher, steamboat owner and railroad investor)
- Kensington, New Hampshire – Baron Kensington (owner of Kensington Palace in London)
- Kent, Ohio – Marvin Kent
- Kentfield, California – Albert Emmet Kent (landowner)
- Keough Hot Springs, California – Philip P. Keough (resort owner)
- Kerman, California – W.G. Kerckhoff and Jacob Mansar (promoters)
- Kettleman City, California – Dave Kettleman (early rancher)
- Keyesville, California – Richard M. Keyes (gold discoverer in Kern County)
- Kiester, Minnesota – Jacob Kiester (county historian)
- Kimball, South Dakota – J.W. Kimball (surveyor)
- King City, California – Charles King (founder)
- King of Prussia, Pennsylvania – After a local tavern named after Frederick II of Prussia
- Kingfield, Maine – William King (future governor of Maine)
- Kingsbury Plantation, Maine – Judge Sanford Kingsbury (landowner)
- Kingsville, Texas – Captain Richard King (owner of the King Ranch)
- Kirbyville, Texas – John Henry Kirby (lumber businessman)
- Kirkwood, California – Zack Kirkwood (rancher and early settler)
- Kirtland, Ohio – Turhand Kirtland (principal of the Connecticut Land Company)
- Kiryas Joel, New York – Joel Teitelbaum (rabbi of Satmar)
- Kit Carson, California and Kit Carson, Colorado – Kit Carson
- Kneeland, California – John A. and Tom Kneeland (first settlers)
- Knights Landing, California – Dr. William Knight (early settler)
- Knightsen, California – George W. Knight (town founder) and his wife Christina Christensen
- Knowles, California – F.E. Knowles (granite quarry owner)
- Knox, Maine – General Henry Knox
- Knoxville, California – Ranar B. Knox, first postmaster
- Knoxville, Tennessee – Henry Knox
- Kosciusko, Mississippi – Tadeusz Kościuszko
- Kossuth, Mississippi – Lajos Kossuth
- Kotzebue, Alaska – Otto von Kotzebue
- Kountze, Texas – Herman and Augustus Kountze (financial backers of the Sabine and East Texas Railroad)
- Kranzburg, South Dakota – Nicholas Friedrich Wilhelm, Johann, Mathais, and Paul Ferdinand Kranz (settlers)
- Kyle, Texas – Captain Fergus Kyle (founder)
Read more about this topic: List Of American Places Named After People