| Flag | Date | Use | Description |
| 1386–1542 | The heraldic banner of the Lordship of Ireland was based on its coat of arms. The earliest depiction of the 'triple crown' motif is found on the arms granted by Richard II to Robert de Vere as Lord of Ireland in 1386. "They were borne, apparently as the arms of Ireland, in the funeral procession of Henry IV in 1413. They appear as a device on the Irish coinage of Edward IV, Richard III, Henry VII, and the pretender, Lambert Simnel. Edward IV specified them as the Irish arms in an indenture of 1483". The 'triple crown' motif has been traditionally associated with St. Edmund, the Saxon king of East Anglia who is today one of the patron saints of England. The flag of East Anglia was a St. George's Cross with a blue coat of arms featuring three gold crowns – visually similar to the arms of the province of Munster. In his work 'Vicissitudes of Families', Bernard Burke, the Ulster King of Arms, proposed that St. Edmund's Banner was borne during the Norman Invasion of Ireland. A section of Christ Church Cathedral in Dublin is dedicated to St. Edmund, although his iconography is not displayed. | The banner of the Lordship of Ireland was based on the arms and feature three golden crowns ordered vertically on a blue background with a white border. It is blazoned: "Azure, three crowns in pale Or, bordure Argent." |
| 1542–1801 | Standard of the Kingdom of Ireland. From 1801 has been incorporated in the lower-left quadrant of the Royal Standard of the United Kingdom | A silver stringed gold harp on a blue field. |
| 1642–present | The green harp flag of the 17th century Confederacy of Ireland and an unofficial flag of Ireland during the 18th and 19th century. Variants have been used as the basis for numerous flags of Ireland. It was used by the Irish team at the 1930 British Empire Games. | A silver-stringed gold cláirseach harp on a green field. |
| 1783–present | The St. Patrick's Saltire, also known as the Cross of St Patrick, after Saint Patrick, the main patron saint of Ireland. "The Saltire became an established Irish symbol in 1783 with the founding of the Order of Saint Patrick by King George III to mark the legislative independence of the Kingdom of Ireland which lasted from 1783 to 1801. The Saltire is believed to derive from the arms of the FitzGeralds who were the Earls of Kildare and later Dukes of Leinster. Incidentally, Kildare County Council uses the Saltire on its coat of arms, as do Cork City and Trinity College Dublin, that both feature two flags – St. George's Cross and St. Patrick's Saltire. The flags of Queen's University Belfast and the Royal College of Surgeons in Ireland use the symbol and it can also be found on the badge of the Police Service of Northern Ireland ". The flag has been used for almost 30 years by local authorities in Downpatrick for St. Patrick's Day. In addition, Church of Ireland flies this flag on special religious days throughout the island. While the saltire represents Ireland on the flag of the United Kingdom, this use is disputed by some Irish nationalists who have described the saltire as an "1800 English invention for a people who had never used it". | The Saint Patrick's Saltire features a red saltire on a white field. In heraldry these arms are blazoned: "Argent, a saltire gules". |
| 1821–1922 | Flag of the Lord Lieutenant of Ireland. This was granted in 1821, by the Lords Commissioners of the Admiralty under royal warrant, "to prevent the Inconvenience experienced for want of a flag distinguishing the presence of the Lord Lieutenant on board His Majesty's ships". The flag became defunct when the office was abolished by the Irish Free State Act 1922. | The flag of the United Kingdom defaced with the coat of arms of Ireland. |
| ???–present | The Four Provinces Flag of Ireland. This flag, and variants of it, have been used by various all-Ireland sports teams and cultural organisations. | The arms of the four provinces of Ireland are shown in quadrants. The order in which the arms appear varies. |
| Flag | Date | Use | Description |
| 1684–1922 | Flag of the Royal Irish Regiment of the British Army. Also known as the 18th Regiment of Foot | |
| 1688–1791 | Flag carried in different variations by the Irish Brigade of the French Army | red and green cross, with motto "In Hoc Signo Vinces" |
| 1710–1815 | Flag of the Regiment of Hibernia aka the "O'Neill's Regiment" of the Spanish Army | |
| 1770s–1780s | The flag of the Dublin Volunteers; a militia unit raised in Ireland during the late 1770s as part of the wider Irish Volunteer movement. | Red background featuring the St Patricks Cross. |
| 1770s–1780s | The flag of the Ormond Union Cavalry; a militia unit raised in Ireland during the late 1770s as part of the wider Irish Volunteer movement. | Features the motto "Pro aris et focis" |
| 1770s–1780s | The flag of the Parsonstown Volunteers; a militia unit raised in Ireland during the late 1770s as part of the wider Irish Volunteer movement. | Features the motto "Vis unita fortior" |
| 1793–1881 | Flag of the 86th Regiment of Foot of the British Army | |
| 1798 | Flag carried by the United Irishmen at the Battle of Arklow | Green background with white Christian cross and the slogan "Liberty or Death". |
| 1803 | Flag raised by Robert Emmet during the Irish rebellion of 1803 | A green flag with a gold pike topped with a red phrygian cap, superimposed over which is a gold harp, and a gold scroll bearing the slogan "Erin Go Brah" in black beneath the harp. |
| 1846–1848 | The green silk flag of the Saint Patrick's Battalion of the Mexican Army may have incorporated the old Irish Harp flag, which may date back to the Irish Confederacy. However, no original depictions are extant, and period descriptions of it differ. | Green background with Irish Harp, shamrocks and Motto Erin Go Bragh in Gold |
| 1861–1864 | Colour of the 28th Massachusetts Infantry regiment of the Irish Brigade of the Union Army | Green background with Irish Harp and motto Faugh a Ballagh |