K1
- 1K (disambiguation)
- Algebraic K-theory
- BMW K1
- Brandt Mle CM60A1
- Daewoo Precision Industries K1
- EMERK
- Family K1
- Fokker K.I
- Furness Railway K1
- GSR Class K1
- Gimhae Air Base
- HMS Acanthus (K01)
- HNoMS Andenes (K01)
- Haplogroup LT
- IVL K.1 Kurki
- K-1
- K-1 (Kansas highway)
- K-1 (rocket)
- K-1 Attack
- K-1 cart
- K-1 visa
- K-class sloop
- K. 1a
- K. 1b
- K. 1c
- K. 1d
- K. 1e
- K. 1f
- K1 (building)
- K1 Britannia
- K1 fund
- K1 tank
- K1-class gunboat
- KI (disambiguation)
- KL (disambiguation)
- Kahoot!
- Kawai K1
- Kay One
- Keiichi Morisato
- Kerrang!
- Kingz One
- Kirkuk
- Kommune 1
- Kucher Model K1
- Kyler Murray
- Kōnāhuanui 1
- LNER Class K1
- LNER Thompson/Peppercorn Class K1
- Larcum Kendall
- List of Higurashi no Naku Koro ni characters
- List of Swedish cavalry regiments
- List of solo keyboard sonatas by Domenico Scarlatti
- London Buses route K1
- Magnetophon K1
- Masherbrum
- Motorola KRZR K1
- Northern Counties Committee
- Pennsylvania Railroad locomotive classification
- Pentax K-01
- Pentax K-1
- SR K1 class
- Sendo
- Skoda K series
- Soviet submarine K-1
- Tasmanian Government Railways K class
- Tatra K1
- Tegra K1
- USS K-1 (SS-32)