Family research · Phase 6b of the world atlas

Flags of Iceland

An island settled by Norse chieftains who then spent over three centuries deliberately governing themselves without a king — the Althing, founded around 930, is among the oldest surviving parliamentary institutions in the world. What follows is a lineage of only seven flags across eleven hundred years: a long self-governing commonwealth with no state banner at all, four centuries under first Norwegian and then Danish crowns, and a national flag design that has not changed once since Iceland first won the right to fly it in 1915.

The republic itself was declared on 17 June 1944 — during the Nazi occupation of Denmark, whose king Iceland was still nominally united with. Copenhagen, under German occupation, was in no position to object.

Scope of this page: the island of Iceland, c. 930–present, seven political entities. No internal regional split is shown below — Iceland has never been internally partitioned between rival governments at any point in its documented history, so this page follows macedonia-flags.html and slovakia-flags.html in tracing one whole-island border rather than inventing a division that never existed. Part of a larger atlas — see the map and linked pages at the bottom.

One island, seven flags

Iceland's own real coastline, traced whole — the same honest choice macedonia-flags.html and slovakia-flags.html made: no internal partition to show, because none genuinely existed. What changes here is only who held sovereignty over the whole island at once. Press play, or drag the slider.

Iceland is the one Nordic territory in this atlas with no land border to anyone. Every other country in the Scandinavia hub either shares a frontier with a neighbor or sits close enough across water to be swapped between crowns by treaty. Iceland's isolation in the North Atlantic meant every change of sovereignty here happened by charter, treaty, or referendum — never by an army crossing a border.

930

The Icelandic Commonwealth

Real traced coastline (johan/world.geo.json), no internal partition — see the rule box above for why.

the same flag, unchanged since 1915 — only the state beneath it changed

1944 – present

Republic of Iceland

RepublicSveinn BjörnssonLutheranism (established state church)

Migration & conquest:Immigration: Polish labor migrants (2004–)Emigration: to Norway after the 2008 financial crash

Who & why: a national referendum on 20–23 May 1944 votes overwhelmingly (nearly 97%) to dissolve the 1918 union with Denmark and become a republic; independence is formally declared at Þingvellir — the same site as the medieval Althing — on 17 June 1944. The date is deliberate: it is the birthday of Jón Sigurðsson, the 19th-century leader of Iceland's independence movement. The timing is also a real historical irony — Denmark itself is under Nazi occupation at the moment its union with Iceland is dissolved, and Copenhagen, powerless to object, does not.

What it represents: no new flag is adopted. The blue-white-red cross flag approved for Iceland in 1915 and used as the full state flag since 1918 simply continues, now flying over a republic instead of a kingdom — the only transition in this whole lineage that changes nothing about the flag itself.

Paint guide

Proportions18:25, off-center Nordic cross.

LayoutBlue field; white-fimbriated red cross, arms shifted toward the hoist.

Blue#0246AD

White#F4EFE1

Red#A4302A

now the full state and merchant flag, not just a coastal-waters flag

1918 – 1944

Kingdom of Iceland

Sovereign state, personal unionChristian XLutheranism (state church)

Migration & conquest:Occupied by: Britain, then the United States (1940–45)

Ruling house:House of Glücksburg

Who & why: the Act of Union, signed 1 December 1918, recognizes Iceland as a fully sovereign state — the Kingdom of Iceland — sharing only its monarch, King Christian X, with Denmark, in a structure deliberately modeled on the earlier Sweden–Norway union of 1814–1905. Iceland gains its own flag at sea, its own neutrality in foreign affairs, and the right to revisit or end the union after 25 years — the option Iceland exercises at the earliest opportunity, in 1944.

What it represents: the blue-white-red cross flag, already flown domestically since 1915, becomes Iceland's full state and merchant flag for the first time — flown internationally at sea rather than confined to Icelandic territorial waters. The design does not change; only its legal status does.

Paint guide

Proportions18:25, off-center Nordic cross.

LayoutBlue field; white-fimbriated red cross, arms shifted toward the hoist.

Blue#0246AD

White#F4EFE1

Red#A4302A

Denmark's own Dannebrog for most of this period — Iceland's own flag only emerges near its end

1814 – 1918

Iceland under Denmark

Danish possessionFrederick VILutheranism (state church)

Migration & conquest:Emigration: to North America (1870s–1914)

Ruling house:House of Glücksburg

Who & why: the January 1814 Treaty of Kiel, forced on Denmark after backing the losing side in the Napoleonic Wars, strips away Norway but explicitly carves out Iceland (with the Faroe Islands and Greenland) as territory Denmark keeps — Iceland's four-century tie had technically run through the Norwegian crown, but Copenhagen had governed it directly in practice for generations, and Denmark holds onto it while Norway itself is handed to Sweden. Icelandic nationalism grows steadily through the 19th century, led by Jón Sigurðsson; home rule is granted in 1904.

What it represents: for most of this century, Iceland flies Denmark's own Dannebrog, the world's oldest continuously used national flag, with no distinct Icelandic symbol at all. That changes on 19 June 1915, when King Christian X approves a flag for Iceland's own domestic and territorial-waters use — a blue field with a white-fimbriated red cross, deliberately distinguished from Greece's similar blue-and-white by adding red. It is the first time in Iceland's history a flag of its own has flown.

Paint guide

ProportionsDanish state flag, 3:4 (swallow-tailed variants existed for state use); shown here as a plain rectangle.

LayoutRed field, off-center white Nordic cross — the Dannebrog, flown over Iceland as ordinary Danish territory until 1915.

Red#A4302A

White#F4EFE1

the Dannebrog, flown over Iceland under a Danish-led union crown

1523/1537 – 1814

Iceland under Denmark–Norway

Crown territoryChristian IIILutheranism (state church, imposed 1550)

Migration & conquest:Emigration: captives seized in the 1627 Turkish Abductions

Ruling house:House of Oldenburg

Who & why: when Sweden breaks from the Kalmar Union in 1523, Denmark and Norway stay bound together in a narrower union — Iceland, already tied to the Norwegian crown since 1262, simply continues under the same union, now led firmly from Copenhagen rather than Oslo. The Danish crown formally imposes the Lutheran Reformation on Iceland by 1550, executing the last Catholic bishop, Jón Arason, and by 1602 establishes a harsh royal trade monopoly that damages the Icelandic economy for nearly two centuries.

What it represents: the Dannebrog, already centuries old, flies over Iceland as part of the broader Denmark–Norway union — no distinct Icelandic symbol exists, and Iceland's governance grows steadily more centralized in Copenhagen over these three centuries.

Paint guide

ProportionsNo fixed civil ratio for most of this period.

LayoutRed field, off-center white Nordic cross.

Red#A4302A

White#F4EFE1

the union flag — three crowns for Denmark, Norway, and Sweden together

1397 – 1523/1537

Iceland under the Kalmar Union

Union memberMargaret IRoman Catholicism (state religion)

Who & why: Margaret I of Denmark assembles personal control over Denmark, Norway, and Sweden through the 1390s; at Kalmar Castle in June 1397 her great-nephew Eric of Pomerania is crowned king of the combined union. Iceland, already a Norwegian dependency since 1262, is carried into the union as part of Norway's own territory — it never joins as a separate party, and its day-to-day governance through a royal governor (hófuðsmaður) changes little.

What it represents: the Kalmar Union's own banner — a gold field with a red Scandinavian cross and three crowns, symbolizing the three united kingdoms — flies nominally over Iceland as part of Norway's share of the union, though everyday local administration barely registers the change in Reykjavík or Skálholt.

Paint guide

ProportionsNo fixed ratio recorded.

LayoutGold field, red Nordic cross, three white crowns.

Gold#C9A13C

Red#A4302A

White (crowns)#F4EFE1

Norway's own royal banner, the crowned lion and axe, stylized

1262 – 1397

Iceland under the Norwegian Crown

Crown territoryHaakon IV "the Old"Roman Catholicism (state religion)

Ruling house:House of Sverre

Who & why: after decades of internal violence — the Age of the Sturlungs, a brutal feud among rival chieftain clans that leaves the Commonwealth ungovernable — Icelandic chieftains sign the Gamli sáttmáli (the "Old Covenant") in 1262, submitting to King Haakon IV of Norway in exchange for peace and a guarantee that Icelandic law keeps being written and enforced under Icelandic custom.

What it represents: it is a real loss of sovereignty, but a notably gentle one — the Althing continues meeting, now under a Norwegian-appointed governor, and Iceland's own law code (later revised as Jónsbók in 1281) stays in force. Norway's own royal banner, the crowned golden lion bearing an axe on a red field, becomes the symbol of the crown Iceland now answers to.

Paint guide

ProportionsNo fixed ratio recorded.

LayoutRed field, gold crowned lion rampant bearing an axe (shown stylized, not exact heraldry).

Red#A4302A

Gold#C9A13C

placeholder maroon field — pre-heraldic era, no state flag existed

c. 930 – 1262

Icelandic Commonwealth

CommonwealthNo single ruler documentedNorse paganism (until 1000)

Migration & conquest:Immigration: Norse & Celtic settlement (c. 874–930)

Who & why: Norse settlers, arriving from around 874, organize the island's chieftaincies into a shared legal and political order: the Alþingi (Althing), founded at Þingvellir around 930, is a general assembly of chieftains that makes law and settles disputes — one of the oldest surviving parliamentary institutions in the world. Uniquely among medieval European polities, the Commonwealth has no king and no central executive at all; law-speaking, courts, and enforcement are distributed among the goðar (chieftains). It ends only when internal feuding among rival chieftain clans — the Age of the Sturlungs — makes self-government untenable and the chieftains submit to Norway in 1262.

What it represents: no securely documented flag survives from this pre-heraldic era, and none would be expected — heraldic flags as a European institution do not really exist yet even on the continent, let alone in a decentralized commonwealth with no crown to fly one for. Iceland's first flag concept of any kind is centuries away, only emerging in the 1890s as a symbol of the independence movement. Shown here honestly blank rather than invented.

Paint guide

ProportionsN/A — no attested flag.

Reading the tags

Commonwealth — self-governing, no king

Crown territory — ruled directly by a foreign king

Union member — part of a shared Scandinavian crown

Danish possession — administered as Danish crown territory

Sovereign kingdom — independent, in personal union with a foreign king

Republic — fully sovereign, no monarch

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 Iceland 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 Iceland →

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 Scandinavia hubFive countries, eleven centuries