Flags of Ireland

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Flags of Ireland

From fragmented Gaelic kingdoms with no single banner, through a foreign lordship that for three centuries controlled little beyond a fortified strip around Dublin, a crown-claimed kingdom, a full century-plus inside the United Kingdom, a chaotic and contested revolutionary declaration, and a dominion in ambiguous limbo — to the green-white-orange tricolor of the sovereign Republic that has flown since 1949.

The tricolor itself is older than the Republic: first flown in 1848 as a gift from French sympathizers, revived over Dublin's General Post Office during the 1916 Easter Rising, and adopted as the national flag at independence in 1922 — the same cloth carried through every constitutional change since.

Scope of this page: the political entities that trace to the modern Republic of Ireland, prehistory–present, seven eras. Northern Ireland remained part of the United Kingdom after 1921 and is covered on the UK's own page, not here.

The Pale and Gaelic Ireland, c. 1171–1541

Ireland's own real, centuries-documented internal split: for roughly 370 years, English royal authority on the island was in practice confined to a fortified strip around Dublin known as "the Pale," while the rest of the island stayed under native Gaelic (and semi-independent Anglo-Irish) lordships the crown didn't actually govern. Press play, or drag the slider.

"Beyond the Pale" is a literal phrase, not a figure of speech. By the 1494 Statute enclosing it, the Pale covered only parts of modern counties Dublin, Meath, Louth and Kildare — a few days' ride across at most. Everything outside that boundary ditch was, in the crown's own paperwork, effectively foreign territory. The line below only solidifies where the two were actually governed apart — it dissolves the moment one authority claims the whole island in 1541, and dissolves again for good when that authority becomes an independent Irish government of its own after 1922.
1171
GREAT BRITAIN THE PALE GAELIC IRELAND
Anglo-Normans land, the Pale begins

Schematic internal partition on a real traced border — the Pale's exact boundary shifted across the medieval period and is shown here approximately, not surveyed. Great Britain's west coast is shown faint for geographic context only — not a land border, but Ireland's nearest neighbor across the Irish Sea.

green–white–orange vertical tricolor
1949 – present

Republic of Ireland

Sovereign republicJohn A. CostelloNo established state religion
Migration & conquest:Immigration: Celtic Tiger & EU enlargement (1994–)Emigration: to Britain & abroad (1950s–80s)

Who & why: the Republic of Ireland Act, passed in 1948 and in force from 18 April 1949, formally declares the state a republic and ends the last lingering constitutional ambiguity about its relationship to the British Crown — Ireland also leaves the Commonwealth in the same act. It joins the United Nations in 1955 and the European Economic Community in 1973.

What it represents: the same tricolor flown since 1922, unchanged — green for the older Gaelic and Catholic tradition, orange for the Protestant/Williamite tradition, white for the hoped-for peace between them, a design explicitly chosen in 1848 to represent reconciliation rather than conquest.

Paint guide
Proportions2:1 (width:height 2:1 per current official spec; shown 3:2 here for atlas consistency), three equal vertical bands.
LayoutGreen at hoist, white center, orange at fly.
Green#169B62
White#FFFFFF
Orange#FF883E
the same tricolor, a dominion of uncertain constitutional status
1922 – 1949

Irish Free State / Éire

DominionW. T. CosgraveNo official state religion
Migration & conquest:Emigration: to Britain & the US (1920s–40s)

Who & why: the Anglo-Irish Treaty, signed December 1921 and ratified by the Dáil in January 1922, creates the Irish Free State as a self-governing dominion of the British Commonwealth — a compromise that splits the independence movement and triggers the 1922–23 Irish Civil War between pro- and anti-Treaty factions. Éamon de Valera's 1937 Constitution renames the state Éire (Ireland), removes most remaining royal functions, and reduces the King's role to external representation only — but stops short of declaring a republic outright, leaving genuine ambiguity about the state's exact status for another twelve years.

What it represents: the tricolor, already flown informally since 1916, is formally adopted as the state's flag at independence — unchanged through the 1937 rename, since the constitutional shift from "Free State" to "Éire" was a change of name and law, not of flag.

Paint guide
ProportionsThree equal vertical bands.
LayoutGreen at hoist, white center, orange at fly.
Green#169B62
White#FFFFFF
Orange#FF883E
the tricolor, raised over the GPO and carried through the War of Independence
1919 – 1922

Irish Republic (revolutionary period)

Contested / revolutionary republicÉamon de ValeraNo established state religion

Who & why: the tricolor first flies over Dublin's General Post Office during the Easter Rising of April 1916 — crushed within a week, but its executed leaders turn public opinion. Sinn Féin MPs elected in the 1918 general election refuse to sit at Westminster and instead convene their own parliament, the first Dáil Éireann, on 21 January 1919, unilaterally declaring an Irish Republic on the same day guerrilla fighting of the War of Independence begins. No foreign government recognizes it, and London never accepts it as sovereign, but the Dáil operates a parallel court system and administration in parts of the country until the July 1921 truce and the Treaty that follows.

What it represents: the same green-white-orange tricolor used since 1848, now flown as a national rather than a purely symbolic banner for the first time — alongside it, the Rising itself flew a separate green flag reading "IRISH REPUBLIC" in gold over the GPO, a distinct and equally significant symbol of this specific five-year period.

Paint guide
ProportionsNo single fixed ratio yet standardized.
LayoutGreen at hoist, white center, orange at fly.
Green#169B62
White#FFFFFF
Orange#FF883E
the Union Jack, flown over an Ireland governed directly from Westminster
1801 – 1919

United Kingdom of Great Britain and Ireland

Part of the United KingdomGeorge IIIChurch of Ireland (until 1871)
Migration & conquest:Emigration: Great Famine exodus (1845–52)Emigration: post-Famine wave (1850–1914)

Who & why: the 1800 Act of Union, taking effect 1 January 1801, abolishes the separate Kingdom of Ireland and its Dublin parliament outright, merging Ireland directly into the United Kingdom with Irish MPs sitting at Westminster instead. The 19th century brings Catholic Emancipation (1829), the catastrophic Great Famine (1845–52, which kills roughly a million and drives mass emigration), and a growing Home Rule movement that culminates in the 1916 Easter Rising and the 1919–21 War of Independence.

What it represents: the Union Flag, already combining England's St George's Cross and Scotland's St Andrew's Cross since 1606, is redesigned in 1801 to add Ireland's St Patrick's Saltire (a red diagonal cross), the version still flown by the United Kingdom today — a visible, permanent record of Ireland's absorption that long outlived its own political relevance to the island.

Paint guide
Proportions1:2.
LayoutBlue field; combined St George's, St Andrew's and St Patrick's crosses (simplified here, not to precise offset).
Blue#00247D
Red#CF142B
White#FFFFFF
green field, the gold Irish harp — a kingdom of the crown, not of an Irish parliament's full making
1541 – 1801

Kingdom of Ireland

Kingdom (crown-controlled)Henry VIIIChurch of Ireland (Anglican)
Migration & conquest:Immigration: Plantation of Ulster settlers (1609–)Conquered by: Cromwellian England
Ruling house:O'Neill of TyroneO'Brien of ThomondFitzGerald (Kildare & Desmond)Butler of Ormond

Who & why: Henry VIII's Crown of Ireland Act of 1541 elevates the old Lordship to a kingdom in its own right — and, crucially, asserts crown authority over the whole island, not just the Pale, beginning the Tudor conquest that violently subdues the remaining Gaelic and Old English lordships over the following six decades. The 17th century brings the Plantation of Ulster, the 1641 Rebellion, Cromwell's brutal 1649–53 campaign, and the Williamite War (1689–91) that cements Protestant Ascendancy rule under a still-nominally-separate Dublin parliament, itself heavily subordinate to London.

What it represents: the harp, already associated with Ireland in continental heraldry by the 15th century, replaces the earlier three-crowns arms specifically because Henry VIII (recently excommunicated) wanted to shed an emblem linked to the papacy — the gold harp on a green or blue field becomes Ireland's enduring heraldic symbol from this point on, still part of the state's arms today.

Paint guide
ProportionsNo fixed civil ratio recorded for most of this period.
LayoutGreen field, gold harp (blue field also attested in some renderings).
Green#0B7A3D
Gold harp#E8C96B
three gold crowns on blue, the arms attributed to the medieval lordship
1171/1177 – 1541

Lordship of Ireland

Anglo-Norman lordshipHenry IIRoman Catholicism
Migration & conquest:Conquered by: Anglo-Norman England
Ruling house:O'Neill of TyroneO'Brien of ThomondFitzGerald (Kildare & Desmond)Butler of Ormond

Who & why: Henry II of England lands at Waterford in October 1171, asserting overlordship following the earlier 1169 arrival of Anglo-Norman knights invited into an Irish dynastic dispute (the 1155 papal bull Laudabiliter is often cited as prior authorization, though its authenticity is debated by historians); Henry's son John is formally granted the lordship in 1177. In practice, direct royal control never extends much past "the Pale" around Dublin (see the map above) — the rest of the island stays under Gaelic Irish lordships and increasingly Gaelicized Anglo-Norman ("Old English") magnates who intermarry with and adopt the customs of those they were meant to be governing.

What it represents: three gold crowns on a blue field, the arms historians most commonly attribute to the medieval Lordship, distinct from the harp adopted later — some later Tudor sources suggest the change away from this design was partly to avoid its association with the three-crowns imagery used elsewhere for papal or Catholic symbolism, though the exact medieval usage is not as fully documented as later periods.

Paint guide
ProportionsNo fixed ratio recorded — heraldic arms, not a standardized civil flag.
LayoutBlue field, three gold crowns (two over one).
Blue#1C3F6E
Gold#E8C96B
NO FLAG DOCUMENTED
placeholder maroon field — fragmented pre-Norman era, no single flag survives
Prehistory – 1171

Gaelic Ireland

Gaelic kingdom(s)No single ruler documentedGaelic paganism, then Christianity
Migration & conquest:Immigration: Viking settlers (9th–10th c.)
Ruling house:O'Brien of Thomond

Who & why: pre-Norman Ireland was never a single state but a patchwork of dozens of local kingdoms (tuatha), loosely organized under a handful of larger provincial over-kingships, with the title of Ard Rí ("High King," seated traditionally at Tara) more often an aspiration or an honorific than a genuine unified rulership. Christianity arrives from the 5th century (traditionally linked to St Patrick), and Viking raids and settlements from the late 8th century onward found Dublin and other coastal towns as trading ports, but no single Irish crown or state ever consolidates the whole island before the Anglo-Norman arrival in 1169–71.

What it represents: no securely documented flag survives from this era — individual Gaelic dynasties used heraldic devices and battle standards (often associated later, and partly anachronistically, with symbols like the sunburst or specific animal totems) rather than anything resembling a territorial national flag. Shown here honestly blank rather than invented, matching this atlas's standard treatment for pre-heraldic eras.

Paint guide
ProportionsN/A — no attested flag.

Reading the tags

Gaelic kingdom(s) — fragmented native rule, no single state
Anglo-Norman lordship — nominal crown control, centered on the Pale
Kingdom (crown-controlled) — nominally separate, English/British monarch
Part of the United Kingdom — administered directly from London
Contested / revolutionary republic — unilaterally declared, fighting for recognition
Dominion — self-governing but crown-linked, republic status ambiguous
Sovereign republic — fully independent
Leader — the named ruler most associated with the era's start
State religion — the official/established faith, not the population's

Find the records

Family history research for Ireland lives in a different project, Record Atlas, which maps which archive actually holds the paper for a given place and era.

Search Record Atlas for Ireland →

Records here are filed by historical jurisdiction, not modern borders — check the region that covers your ancestral town:

Ireland — the whole island

More of the atlas

This page is one lineage in a larger set. See the region-wide map and the other countries here:

Flags Atlas indexSearch every country and hub British Isles hubIreland, the UK, and their shared history