| Image | Item No. | Description |
| 7188-1 (Inv) | King's Carriage Ambush
268 Parts, 4 Minifigures, 2011
Catalog: Sets: Castle: Kingdoms |
| 6080-1 (Inv) | King's Castle
627 Parts, 12 Minifigures, 1984
Catalog: Sets: Castle: Lion Knights |
| 7946-1 (Inv) | King's Castle
893 Parts, 8 Minifigures, 2010
Catalog: Sets: Castle: Kingdoms |
| 70404-1 (Inv) | King's Castle
961 Parts, 7 Minifigures, 2013
Catalog: Sets: Castle |
| 7094-1 (Inv) | King's Castle Siege
921 Parts, 10 Minifigures, 2007
Catalog: Sets: Castle: Fantasy Era |
| 6081-1 (Inv) | King's Mountain Fortress
401 Parts, 8 Minifigures, 1990
Catalog: Sets: Castle: Crusaders |
| 8875-1 (Inv) | King's Siege Tower
113 Parts, 4 Minifigures, 2005
Catalog: Sets: Castle: Knights Kingdom II |
| 10223-1 (Inv) | Kingdoms Joust
1533 Parts, 9 Minifigures, 2012
Catalog: Sets: Castle: Kingdoms |
| 608-1 (Inv) | Kiosk
33 Parts, 1971
Catalog: Sets: LEGOLAND: Building |
| 263-1 (Inv) | Kitchen Set
172 Parts, 1974
Catalog: Sets: Homemaker |
| 5929-1 (Inv) | Knight and Castle Building Set
140 Parts, 1 Minifigure, 2011
Catalog: Sets: Creator: Basic Set: Castle |
| 4775-1 (Inv) | Knight and Squire
19 Parts, 2 Minifigures, 2004
Catalog: Sets: DUPLO: Castle |
| 7950-1 (Inv) | Knight's Showdown
51 Parts, 2 Minifigures, 2010
Catalog: Sets: Castle: Kingdoms |
| 6059-1 (Inv) | Knight's Stronghold
206 Parts, 5 Minifigures, 1990
Catalog: Sets: Castle: Black Knights |
| 383-2 (Inv) | Knight's Tournament
184 Parts, 6 Minifigures, 1979
Catalog: Sets: Castle: Classic Castle |
| 6083-1 (Inv) | Knight's Tournament
185 Parts, 6 Minifigures, 1981
Catalog: Sets: Castle: Classic Castle |
| 8801-1 (Inv) | Knights' Attack Barge
153 Parts, 2 Minifigures, 2005
Catalog: Sets: Castle: Knights Kingdom II |
| 4777-1 (Inv) | Knights' Castle
164 Parts, 4 Minifigures, 2004
Catalog: Sets: DUPLO: Castle |
| 8799-1 (Inv) | Knights' Castle Wall
160 Parts, 3 Minifigures, 2004
Catalog: Sets: Castle: Knights Kingdom II |
| 7091-1 (Inv) | Knights' Catapult Defense
101 Parts, 4 Minifigures, 2007
Catalog: Sets: Castle: Fantasy Era |
| 76020-1 (Inv) | Knowhere Escape Mission
422 Parts, 3 Minifigures, 1 Book, 2014
Catalog: Sets: Super Heroes: Guardians of the Galaxy |
| 8565-1 (Inv) | Kohrak
40 Parts, 2002
Catalog: Sets: BIONICLE: Bohrok |
| 8551-1 (Inv) | Kohrak Va
28 Parts, 2002
Catalog: Sets: BIONICLE: Bohrok Va |
| 8575-1 (Inv) | Kohrak-Kal
40 Parts, 2003
Catalog: Sets: BIONICLE: Bohrok-Kal |
| 8575-2 (Inv) | Kohrak-Kal with Mini CD-ROM
40 Parts, 1 Gear, 2003
Catalog: Sets: BIONICLE: Bohrok-Kal |
| 8536-2 (Inv) | Kopaka with Mini CD-ROM
33 Parts, 1 Gear, 2001
Catalog: Sets: BIONICLE: Toa |
| 4000005-1 (Inv) | Kornmarken Factory 2012
316 Parts, 2012
Catalog: Sets: LEGO Brand: LEGO Facilities |
| 8580-1 (Inv) | Kraata
3 Parts, 1 Gear, 2003
Catalog: Sets: BIONICLE: Supplemental |
| 6240-1 (Inv) | Kraken Attackin'
70 Parts, 2 Minifigures, 2009
Catalog: Sets: Pirates: Pirates II |
| 8569-1 (Inv) | Krana Pack {American Version}
5 Parts, 2002
Catalog: Sets: BIONICLE: Supplemental |
| 8559-1 (Inv) | Krana Pack {International Version} polybag
5 Parts, 2002
Catalog: Sets: BIONICLE: Supplemental |
| 8599-1 (Inv) | Krana-Kal Mask Pack {American Version}
5 Parts, 2003
Catalog: Sets: BIONICLE: Supplemental |
| 8600-1 (Inv) | Krana-Kal Mask Pack {International Version} polybag
5 Parts, 2003
Catalog: Sets: BIONICLE: Supplemental |
| 2116-1 (Inv) | Krazi blister pack
10 Parts, 1 Minifigure, 5 Gear, 2011
Catalog: Sets: NINJAGO: The Golden Weapons: Spinners |
| 8623-1 (Inv) | Krekka
203 Parts, 2004
Catalog: Sets: BIONICLE: Titans |
| 75156-1 (Inv) | Krennic's Imperial Shuttle
826 Parts, 6 Minifigures, 2016
Catalog: Sets: Star Wars: Star Wars Rogue One |
| 2174-1 (Inv) | Kruncha blister pack
12 Parts, 1 Minifigure, 5 Gear, 2011
Catalog: Sets: NINJAGO: The Golden Weapons: Spinners |
| 3833-1 (Inv) | Krusty Krab Adventures
200 Parts, 3 Minifigures, 2009
Catalog: Sets: SpongeBob SquarePants |
| 70591-1 (Inv) | Kryptarium Prison Breakout
182 Parts, 5 Minifigures, 2016
Catalog: Sets: NINJAGO: Skybound |
| 76045-1 (Inv) | Kryptonite Interception
293 Parts, 3 Minifigures, 1 Book, 2016
Catalog: Sets: Super Heroes: Dawn of Justice |
| 8588-1 (Inv) | Kurahk
45 Parts, 2003
Catalog: Sets: BIONICLE: Rahkshi |
| 8588-2 (Inv) | Kurahk with Bonus Shadow Kraata (Limited Edition)
45 Parts, 1 Gear, 2003
Catalog: Sets: BIONICLE: Rahkshi |
| 8588-3 (Inv) | Kurahk with Mini CD-ROM
45 Parts, 1 Gear, 2003
Catalog: Sets: BIONICLE: Rahkshi |
| 75179-1 (Inv) | Kylo Ren's TIE Fighter
615 Parts, 4 Minifigures, 2017
Catalog: Sets: Star Wars: Star Wars Episode 8 |
| 296-1 (Inv) | Ladies' Hairdressers
160 Parts, 1977
Catalog: Sets: Homemaker |
| 6267-1 (Inv) | Lagoon Lock-Up
167 Parts, 5 Minifigures, 1991
Catalog: Sets: Pirates: Pirates I: Imperial Soldiers |
| 79013-1 (Inv) | Lake-town Chase
448 Parts, 5 Minifigures, 2013
Catalog: Sets: The Hobbit and The Lord of the Rings: The Hobbit |
| 8214-1 (Inv) | Lamborghini Gallardo LP 560-4 Polizia
801 Parts, 2010
Catalog: Sets: Racers: Lamborghini |
| 70312-1 (Inv) | Lance's Mecha Horse
216 Parts, 3 Minifigures, 2016
Catalog: Sets: NEXO KNIGHTS |
| 42110-1 (Inv) | Land Rover Defender
2573 Parts, 2019
Catalog: Sets: Technic: Model: Off-Road |