From Lexicanum

Imperial Sainthood is an honour bestowed upon an individual by the Ecclesiarchy. It is usually bestowed posthumously, but sometimes bestowed upon a living person (see Living Saint).

Besides this list, the loyal Primarchs are considered Imperial Saints. Macharius's generals during the Macharian Crusade are considered "apostles" or Imperial Saints.

List of Imperial Saints

Saint	Era	Notes	Source
Angevin	???	Lord Militant who conquered the Calixis Sector a thousand years ago	Dark Heresy Rulebook
Anais	M41	Living Saint who defended the Order of the Sacred Rose's primary bastion in Sama District, on Kaurava I. Imbued with the Inviolable Aura - an aura of invincibility which rendered every sister of battle in her presence invincible	Dawn of War Soulstorm.
Arabella	M36	Founder of Order of the Sacred Rose, the Liberator, final fate not publicly known	WD292us "The Liber Sororitas" pages 80–81
Aspira	???	Battle Sister Canoness of Order of the Bloody Rose, liberated 100 worlds from heretic Denescura, wearer of Cloak of St. Aspira	Codex: Sisters of Battle (2nd Edition) page 43; WD292us "The Liber Sororitas" page 81
Capilene	???		WD292us "The Liber Sororitas" page 81
Celestine	???	Battle Sister Living Saint, Hieromartyr of the Palatine Crusade	Codex: Witch Hunters (3rd Edition); WD292us "The Liber Sororitas" page 78
Constantine of Alamar	???		WD292us "The Liber Sororitas" page 81
Corvus the Sabine	???		WD292us "The Liber Sororitas" page 81
Decessio	???		WD292us "The Liber Sororitas" page 81
De Haan	???	An Inquisitor of the Donorian sector. He rooted out heresy and corruption on over a thousand worlds. De Haan was finally martyred after over two centuries of service at the Battle of Kostiashak, where Chaos warriors captured him and nailed portions of his anatomy to the defiled cathedral of Trebian. De Haan's acolytes recovered their master's remains, and many of these relics are stored in scented rosewood boxes on the worlds he cleansed. One known relic is a dagger into whose handle has been woven shards of De Haan's armour.	The Killing Ground (Novel) by Graham McNeil, page 248
Dolan	M36	Confessor, martyred by Cardinal Bucharis	WD292us "The Liber Sororitas" page 81
Alicia Dominica	M36	Patron Saint of the Sisterhood, Founder of Order of the Ebon Chalice, Bearer of the Grail of Ages, executioner of Goge Vandire, martyred at Scourging of Frideswide's World	WD292us "The Liber Sororitas" pages 80–81
Drusus	???	Most important saint of the Calixis Sector. A general in his time, later sainted. Scourged a great evil from the planet Iocanthos during the Angevin Crusade, and brought it into the Emperor's light.	VD292Ire Dark Heresy Rulebook, p361-362
Dufaux	???		WD292us "The Liber Sororitas" page 81
Ezra	M40	Martyred 670.M40. He is the patron saint of of undertaking and setting forth. Because Ezra had promised to "light a flame in the darkness to mark all those setting forth," his colour is flame yellow.	Malleus (Novel) by Dan Abnett
Gherick the Confessor	???		WD292us "The Liber Sororitas" page 81
Harmon	???	Cathedral named for him on Corinthus V	Sons of Fenris (Novel) by Lee Lightner
Jason of Huale	???	Bore Axe of Chalcydon, model for Axe of Retribution	Codex: Sisters of Battle (2nd Edition), page 44; WD292us "The Liber Sororitas" page 81
Jerome the Pure	M33	Martyred 888.M33. His host was defeated after challenging the then mortal Periclitor. Put to death after being forced to witness each of his followers eviscerated.	Codex: Chaos Space Marines (3rd Edition, 2nd Codex)
Jerido		An apostolic saint.	Eisenhorn (Omnibus) by Dan Abnett page 201
Josina	???		WD292us "The Liber Sororitas" page 81
Josmane	???		WD292us "The Liber Sororitas" page 81
Kadmon		An apostolic saint	Eisenhorn (Omnibus) by Dan Abnett page 201
Katherine	M36	Founder of Order of the Fiery Heart, the Shield Bearer, martyred by Witch Cult of Mnestteus	Codex: Witch Hunters (3rd Edition); WD292us "The Liber Sororitas" pages 80–81
Kozak	???		WD292us "The Liber Sororitas" page 81
Lacena	???		WD292us "The Liber Sororitas" page 81
Leonis the Blind	M38	Missionary, martyred after having his eyes removed while spreading the word of the Emperor across the wilder systems of the Scarus sector.	Imperial Armour Volume Five - The Siege of Vraks - Part One
Lucia	M36	Founder of Order of the Valorous Heart, martyred by Recidivists	WD292us "The Liber Sororitas" pages 80–81
Lucius of Agatha	???	Confessor, sermons recorded in Book of St. Lucius	Codex: Sisters of Battle (2nd Edition) page 43; WD292us "The Liber Sororitas" page 81
Macharius	M41	Second Lord Commander Solar, general of the Macharian Crusade	Codex: Imperial Guard 3rd edition
Menazzer		An apostolic saint	Eisenhorn (Omnibus) by Dan Abnett page 201
Mina	M36	Founder of Order of the Bloody Rose, martyred by sanguinary cult on Hydraphur	WD292us "The Liber Sororitas" pages 80–81
Olion	???	An apostolic saint	Eisenhorn (Omnibus) by Dan Abnett page 201
Orlanda	???		WD292us "The Liber Sororitas" page 81
Phistinius	???	Imperial Proverb: And Saint Phistinius went unto the enemy unarmed and unarmoured. (quoted by Kronin)	Last Chancers Series by Gav Thorpe
Ollanius Pius	M31	The Imperial Guardsman who gave his life to save the Emperor during the Horus Heresy.	Warhammer 40,000: Compendium
Praxedes of Ophelia VII	M41	Battle Sister Canoness of Order of Our Martyred Lady, sacrificed self on Cardinal World Okassis to allow refugees to escape from Second Tyrannic War	Codex: Sisters of Battle (2nd Edition) page 60; WD292us "The Liber Sororitas" page 81
Sabbat	c. 500-650.M35	The region know as the Sabbat Worlds was so named in her honour.	The Sabbat Worlds Crusade; WD292us "The Liber Sororitas" page 79
Scythus		The Imperial Navy Battleship "Saint Scythus" was named after this saint.	Xenos (Novel) by Dan Abnett
Silvana	M36	Founder of Order of the Argent Shroud, martyred by Death Cult Assassin	WD292us "The Liber Sororitas" pages 80–81
Sebastian Thor	M36	Opposed Goge Vandire, succeeded him as Ecclesiarch	WD292us "The Liber Sororitas" page 81
Tomasi	???		WD292us "The Liber Sororitas" page 81
Verevya	???		WD292us "The Liber Sororitas" page 81
Yamalla	???		WD292us "The Liber Sororitas" page 81