Castle Name	Condition	Description	Early Founder(s) -- Time Period(s) Contructed	Parish/Townland	Ord	Residency	Links
ancient castle (formerly at large house in the square "the Diamond" /Hope Castle/)	None						http://www.from-ireland.net/lewis/m/monaghan.htm
Ancient Fortress (in Cornero wood and Mucknoe lake Shore Castle)	None						http://www.from-ireland.net/lewis/m/clontibret.htm
Castle Blayney (Old "plantation")	None						http://www.from-ireland.net/lewis/m/mucknoe.htm http://www.keithblayney.com/Blayney/CastleBlayney.html
Castle Leslie (Glaslough Castle)	Full		17th century Leslie manor-house			Hotel	http://www.proni.gov.uk/records/private/leslie.htm http://www.countyarmagh.com/armagh_heritage_cathederal.htm
Castle Shane	None						http://www.from-ireland.net/lewis/m/clontibret.htm http://www.from-ireland.net/lewis/m/monaghan.htm http://www.r-alston.co.uk/ch_lost.htm
Donaghmoyne Castle (Manann Castle)	None	A 12th century motte-and-bailey castle.					http://www.from-ireland.net/lewis/m/donaghmoyne.htm http://monaghan.goireland.com/scripts/low/xq/asp/areaid.189/areatype.C/cat.9/SubjectID.77/PremisesID.14966/qx/premises.htm http://web.ukonline.co.uk/nigel.bacon/castles/data/ireland/m/mannan.htm
Donaghmoyne Castle (Vicar's Dale)	None	Site of a 12th century motte and bailey castle.			H 8506		http://www.from-ireland.net/lewis/m/comonaghan.htm http://web.ukonline.co.uk/nigel.bacon/castles/data/ireland/d/donaghmoyne.htm
Essex Castle (Carrickmacross Castle, Carrick Castle, Magheross Castle)	None						http://www.from-ireland.net/lewis/m/carrickmacross.htm http://www.excavations.ie/Pages/Details.php?Year=2000&County=Monaghan&id=5065 http://www.ulster.ac.uk/thisisland/modules/ulsterplantation/carrickmacross.html
Fortress of Sir Edward Blayney	None						http://www.from-ireland.net/lewis/m/monaghan.htm
Hilton Park Estates (Maddenton)	Full						http://www.irish-architecture.com/buildings_ireland/monaghan/clones/hilton.html
Hope Castle (Blayney Castle)	Full						http://www.keithblayney.com/Blayney/CastleBlayney.html http://web.ukonline.co.uk/nigel.bacon/castles/data/ireland/h/hope.htm
Loch Fea Castle	Full*						http://www.from-ireland.net/lewis/m/magheraclooney.htm http://www.from-ireland.net/lewis/m/carrickmacross.htm http://www.ulster.ac.uk/thisisland/modules/ulsterplantation/carrickmacross.html
Maghernacligh Castle	Ruins						http://www.from-ireland.net/lewis/m/comonaghan.htm http://www.obeirnefamily.mcmail.com/FamilyO'Beirne/1100s1500s.htm
Monaghan Castle (Lissadorn Castle, "the Fort of the Fist")	Ruins						http://www.from-ireland.net/lewis/m/comonaghan.htm

14 -- Entries Listed