The most valuable LEGO Castle set today is 6075-2 Castle, worth $7,500 new and sealed. This list covers sets released between 1978 and 2000, and every one of them has retired. The middle set on the list is worth about $2,069. The Classic line has the most sets here. Sets from the 1980s make up about 45% of the list. The castles themselves hold Castle's highest values, from King's Castle of 1984 to the Black Knight's Castle of 1992. A big castle was the centrepiece of the theme, and sealed copies have been scarce for decades.

Below are the most valuable LEGO Castle sets on the secondary market today, ranked by their current value new and sealed.
Most valuable LEGO Castle set
6075-2 Castle $7,500.00
Highest growth set
677 Knight's Procession +25102.40%
Largest set
10193 Medieval Market Village 1,601 pieces

6075-2 Castle

Theme / Subtheme Castle / Classic
Year 1981
Pieces / Minifigs 767 / 14
Availability Retired
This version of the set was only released in the US and is the same as set 375. The iconic set comes with 14 minifigures, including four knights on horses and ten guards/soldiers and was one of the first LEGO sets with minifigures.
6075-2 LEGO Castle
Retail $48.00
Value $7,500.00
Growth  +15525.0%
Annual growth 7.4%

375-2 Castle

Theme / Subtheme Castle / Classic
Year 1978
Pieces / Minifigs 767 / 14
Availability Retired
This version was only released in European, the UK, Australia and Canada. It was also known as "Yellow Castle".
375-2 LEGO Castle
Retail $49.99
Value $4,438.13
Growth  +8778.0%
Annual growth 9.8%

6080 King's Castle

Theme / Subtheme Castle / Lion Knights
Year 1984
Pieces / Minifigs 674 / 12
Availability Retired
It was the first of the castle sets to replace the standard yellow bricks with gray ones.
6080 LEGO Lion Knights King's Castle
Retail $52.75
Value $3,983.11
Growth  +7450.9%
Annual growth 6.4%

6086 Black Knight's Castle

Theme / Subtheme Castle / Black Knights
Year 1992
Pieces / Minifigs 588 / 12
Availability Retired
It is the pinnacle of classic LEGO castles. Built on a raised baseplate with a dungeon, it features a working drawbridge, portcullis, and a secret back gate. The set includes 4 armored knights on horseback, 6 soldiers, a wolfpack bandit, and a ghost. AKA Dungeon Master's Castle.
6086 LEGO Black Knight's Castle
Retail $84.99
Value $3,951.33
Growth  +4549.2%
Annual growth 5.6%

1584 Knight's Challenge

Theme / Subtheme Castle / Lion Knights
Year 1988
Pieces / Minifigs 132 / 8
Availability Retired
It includes both minifigures of the Crusaders and the Black Knights. It consists of a jousting tournament scene with an audience stand, two knights on horseback, a weapons rack, a keg with mugs, and eight minifigures, including a damsel.
1584 LEGO Lion Knights Knight's Challenge
Retail $19.99
Value $3,856.84
Growth  +19193.8%
Annual growth 9.4%

6090 Royal Knight's Castle

Theme / Subtheme Castle / Royal Knights
Year 1995
Pieces / Minifigs 764 / 11
Availability Retired
The large fortress sits on a 32 x 48 x 6 raised baseplate with a central pit and stone pattern and includes dual gates, battlements, and three horses.
6090 LEGO Royal Knight's Castle
Retail $94.99
Value $3,443.69
Growth  +3525.3%
Annual growth 9.2%

6083 Knight's Joust

Theme / Subtheme Castle / Classic
Year 1981
Pieces / Minifigs 211 / 6
Availability Retired
It features a brick-built tournament setting, including an audience stand with throne chairs, two knights on brick-built horses, guards, lances, and flags. This version of the set was released in the United States. A similar version which was released worldwide was set 383-2.
6083 LEGO Castle Knight's Joust
Retail $15.99
Value $3,319.03
Growth  +20656.9%
Annual growth 6.8%

383-2 Knight's Joust

Theme / Subtheme Castle / Classic
Year 1979
Pieces / Minifigs 102 / 6
Availability Retired
The build depicts a tournament scene with two knights on brick-built horses, a red-and-white striped canopy over twin thrones, flags, cups, and an 8×24 green baseplate, and it includes the classic cypress tree element.
383-2 LEGO Castle Knight's Joust
Retail $15.99
Value $3,086.31
Growth  +19201.5%
Annual growth 11.9%

6081 King's Mountain Fortress

Theme / Subtheme Castle / Crusaders
Year 1990
Pieces / Minifigs 435 / 8
Availability Retired
It builds a substantial fortress with a gatehouse, tower, and small jail cell, featuring a working drawbridge and a gate that can be raised and lowered.
6081 LEGO Crusaders King's Mountain Fortress
Retail $58.00
Value $2,955.43
Growth  +4995.6%
Annual growth 8.2%

6085 Black Monarch's Castle

Theme / Subtheme Castle / Black Knights
Year 1988
Pieces / Minifigs 702 / 12
Availability Retired
It consists of a hinged castle structure with a drawbridge, portcullis, prison cell, four horses, and twelve minifigures, including knights, archers, and guards.
6085 LEGO Black Knights Black Monarch's Castle
Retail $67.95
Value $2,336.00
Growth  +3337.8%
Annual growth 9.6%

6071 Forestmen's Crossing

Theme / Subtheme Castle / Forestmen
Year 1990
Pieces / Minifigs 207 / 5
Availability Retired
The set features a woodland hideout built into a large tree and the ruins of a stone tower connected by a rope bridge spanning a river. It includes a white horse with a red saddle and five minifigures: four Forestmen armed with bows, quivers, and spears, plus the Forestwoman, a unique and highly rare minifigure that only appears in this set. Additional details such as a hidden treasure chest, shields, and weapons round out the play features, making it one of the most distinctive Forestmen sets.
6071 LEGO Castle Forestmen's Crossing
Retail $28.50
Value $2,069.46
Growth  +7161.3%
Annual growth 8.5%

6079 Dark Forest Fortress

Theme / Subtheme Castle / Dark Forest
Year 1996
Pieces / Minifigs 464 / 7
Availability Retired
It is the largest Dark Forest set and consists of a woodland hideout with trees, a carriage, two horses, Rob N. Hood, three Forestmen, Sir Lance, a Dragon Master, and a skeleton.
6079 LEGO Castle Dark Forest Fortress
Retail $49.99
Value $1,929.90
Growth  +3760.6%
Annual growth 9.6%

6067 Guarded Inn

Theme / Subtheme Castle / Lion Knights
Year 1986
Pieces / Minifigs 248 / 4
Availability Retired
It features an inn with castle-style architecture, a table, a cup, flowers, and four minifigures: a knight, two soldiers, and a maiden.
6067 LEGO Lion Knights Guarded Inn
Retail $19.75
Value $1,728.70
Growth  +8652.9%
Annual growth 8.1%

6073 Knight's Castle

Theme / Subtheme Castle / Black Falcons
Year 1984
Pieces / Minifigs 410 / 6
Availability Retired
The build depicts a stone-walled fortress with a winch-operated drawbridge, a prison cell with a hinged brick-built door, and decorative and functional shields.
6073 LEGO Black Falcons Knight's Castle
Retail $26.99
Value $1,568.26
Growth  +5710.5%
Annual growth 5.6%

6060 Knight's Challenge

Theme / Subtheme Castle / Lion Knights
Year 1989
Pieces / Minifigs 168 / 8
Availability Retired
It features a jousting tournament with an audience stand, weapons rack, tapped keg, two horses, eight minifigures, and Crusaders and Black Knights factions. It did not appear in regular catalogs and was only available via Shop at Home.
6060 LEGO Lion Knights Knight's Challenge
Retail $21.99
Value $1,470.16
Growth  +6585.6%
Annual growth 10.0%

6075 Wolfpack Tower

Theme / Subtheme Castle / Wolfpack
Year 1992
Pieces / Minifigs 236 / 4
Availability Retired
It consists of a fortress with a drawbridge, sliding cliff wall, hidden compartments, a ghost, three Wolfpack minifigures, and a parrot. It was also called "Wolf People's Island Lair".
6075 LEGO Castle Wolfpack Tower
Retail $29.75
Value $1,331.40
Growth  +4375.3%
Annual growth 9.6%

677 Knight's Procession

Theme / Subtheme Castle / Classic
Year 1979
Pieces / Minifigs 48 / 6
Availability Retired
It features six minifigures: four knights with shields and swords, two knights with axes, and a cart with rubber-wheeled construction. This version was release in continental Europe, the UK and Australia.
677 LEGO Castle Knight's Procession
Retail $4.99
Value $1,257.60
Growth  +25102.4%
Annual growth 8.4%

6082 Fire Breathing Fortress

Theme / Subtheme Castle / Dragon Knights
Year 1993
Pieces / Minifigs 397 / 6
Availability Retired
It includes Majisto, Dragon Master Burnabus, four guards, Wolfpack bandit minifigures. The set features a raised-baseplate castle with multiple levels, a rotating dragon head for dropping rocks, a trapdoor, jail cell, dragon cave, and six minifigures. It was also called "Castle Carreg".
6082 LEGO Dragon Knights Fire Breathing Fortress
Retail $63.99
Value $1,249.70
Growth  +1853.0%
Annual growth 7.3%

6098 King Leo's Castle

Theme / Subtheme Castle / Knights' Kingdom I
Year 2000
Pieces / Minifigs 529 / 8
Availability Retired
It features minifigures of King Leo, Queen Leonora, Princess Storm, two soldiers of Leo, Cedric The Bull, and one of his minions. It was only released in Europe, UK and Australia.
6098 LEGO Knights' Kingdom I King Leo's Castle
Retail $89.99
Value $1,186.15
Growth  +1218.1%
Annual growth 5.4%

6077-2 Forestmen's River Fortress

Theme / Subtheme Castle / Forestmen
Year 1989
Pieces / Minifigs 357 / 6
Availability Retired
It contains a tower structure, a raft and six minifigures, including five Forestmen and a Crusader soldier. The set was also called "Robin’s Lake Stronghold".
6077-2 LEGO Castle Forestmen's River Fortress
Retail $37.49
Value $1,174.95
Growth  +3034.0%
Annual growth 6.4%
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