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Flags of the British Empire

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Flags of the British Empire

The largest empire in history by land area, at its post-WWI peak governing roughly a quarter of the world's population and territory across every inhabited continent. It grows in two distinct waves separated by the shock of losing the Thirteen Colonies, and it unwinds not in one collapse but across four decades of negotiated and fought decolonization, leaving the modern Commonwealth of Nations as its loose successor association.

This empire's reach into this atlas's own country pages is enormous — far too broad to cross-link exhaustively here. Dozens of this atlas's individual country pages, across every continent, carry their own "British colony/protectorate" era descending directly from the empire told on this page.

Scope of this page: the British Empire as a whole transnational entity, late 16th century–present (via the Commonwealth), six phases. Rather than attempting to cross-link every one of this atlas's country pages with a British colonial past, this page links a representative handful and states plainly that most of the rest carry the same lineage on their own pages. See South Asia hub, Ireland, and Australia as starting points. Part of a larger atlas — see the linked pages at the bottom.

The home islands, c. 1583–present

A deliberately simple stand-in: rather than attempting to map a transnational empire that once covered a quarter of the globe, this traces the real coastline of the British Isles themselves — the constant home base underneath every phase of expansion and retreat described below.

This map shows the home islands, not the empire's overseas extent. Charting the empire's actual worldwide territory era-by-era would require tracing dozens of separate countries' own borders — each of which already has its own page in this atlas. What changes here is only the political status of Britain itself and its relationship to the wider empire and Commonwealth, not the shape shown.
before c. 1583
IRELAND NORTH SEA ENGLISH CHANNEL

Real traced coastline of Great Britain and Ireland; the empire's actual overseas territories are not shown — see this atlas's own regional pages for those.

How we know this. 6 of 6 eras on this page carry an evidence panel (2 attested, 1 placeholder image, 3 not yet checked). Only the ones marked attested are confirmed by the sources named under them; where sources disagree or a claim could not be confirmed, the panel says so.
the Union Flag, now flying only over the remaining Overseas Territories and via the Commonwealth
1949/1997 – present

Commonwealth of Nations (loose successor)

Voluntary associationGeorge VINo single state religion
Migration & conquest:Immigration: Commonwealth migration to Britain (1948–)
Ruling house:House of Windsor

Who & why: the 1949 London Declaration allows India to remain in the Commonwealth as a republic without the British monarch as head of state, transforming the organization from an empire's residue into a voluntary association of formally equal, independent states. The 1997 handover of Hong Kong to China is widely treated as the symbolic close of the empire proper. Today the Commonwealth comprises 56 member states (most, though not all, former British territories) cooperating on trade, development, and shared institutions, alongside a small number of remaining British Overseas Territories (Bermuda, the Falklands, Gibraltar, and others) that never became independent states.

What it represents: the sources read do not say how the Union Flag is used by the Commonwealth, or give the 1949/1997 dates. Flags of the World notes that sixty-five colonial badges were in use in 1949 and that badges declined as colonies became independent; Wikipedia's list shows remaining territories with flags of their own (for example British Virgin Islands 1960, British Antarctic Territory 1963, British Indian Ocean Territory 1990) and Akrotiri and Dhekelia using the Union Jack.

Not yet checked against sourceshow we know this

FOTW (coflg): sixty-five colonial badges were in use in 1949, declining as colonies became independent, with the badge-size restrictions lifted in 1999; FOTW (colonial flags): colonial flags date from 1869 and many colonies took arms before independence. Wikipedia's list shows remaining territories with flags of their own (British Virgin Islands 1960, British Antarctic Territory 1963, British Indian Ocean Territory 1990) and Akrotiri and Dhekelia using the Union Jack.

Not established: Neither source says how the Union Flag is used by the Commonwealth of Nations (the page's 'via the Commonwealth' claim) or gives the 1949/1997 dates; the Commonwealth flag itself is not covered. Next: the Commonwealth Secretariat's page on the Commonwealth flag (not read).

Paint guide
Proportions3:5 (UK civil use); shown here at 3:2.
LayoutCombined crosses of St George, St Andrew, and St Patrick — the Union Flag, unchanged in this form since 1801.
Blue#00247D
Red#CF142B
White#F4EFE1
Union Flag or ensign with a colonial badge, the pattern used across dozens of territories
1947 – 1980s

Post-WWII decolonization wave

Empire, dissolvingClement AttleeChurch of England (UK only; no empire-wide religion)
Migration & conquest:Immigration: Windrush generation & Commonwealth arrivals (1948–)
Ruling house:House of Windsor

Who & why: India's independence and simultaneous partition in August 1947, ending nearly two centuries of British rule on the subcontinent, is the pivotal turning point after which decolonization accelerates sharply. Wartime exhaustion, the moral force of the 1941 Atlantic Charter's self-determination principles, and rising nationalist movements across the colonies combine to make continued direct rule untenable. Independence follows across Africa through the late 1950s and 1960s (Ghana 1957, Nigeria 1960, and many others), across the Caribbean through the 1960s–70s, and across the remaining Pacific territories into the 1970s–80s.

What it represents: the sources read describe the colonial convention as a Blue Ensign, or a defaced Red Ensign, with the colony's badge in the fly, and a Union Jack with the colony's badge as the governor's flag (Flags of the World dates this to 1869, and extends it to all circumstances in 1941); it notes sixty-five badges in use in 1949 and a decline as colonies became independent. Wikipedia says the Colonial Naval Defence Act 1865 required colonies to apply their own emblems.

Attestedhow we know this

FOTW coflg: 1865 Blue Ensign with colony badge in the fly; 1869 governors' Union Jack with badge; 1882-1927 defaced Red Ensigns; 1941 governor's flag in all circumstances; 65 badges in 1949; badges declined as colonies became independent. WP: colonies adopted own badges from the early 19th century, Colonial Naval Defence Act 1865 required emblems.

Not established: Page said 'badge in the canton'; FOTW says in the fly for ensigns. Dates 1947-1980s as a wave are not stated by either source.

Paint guide
Proportions1:2, standard British ensign proportions.
LayoutUnion Flag canton with a local colonial badge on the fly (badge shown schematically here as a plain disc).
Blue#00247D
Red#CF142B
White#F4EFE1
Red Ensign, the everyday colonial merchant/territorial flag, at the empire's greatest extent
1919 – 1947

Territorial peak (post-WWI mandates)

Empire, at territorial peakGeorge VChurch of England (UK only; no empire-wide religion)
Migration & conquest:Emigration: assisted British settlers to the dominions (1920s)
Ruling house:House of Windsor

Who & why: the empire reaches its largest-ever extent immediately after WWI, when former German and Ottoman territories are redistributed as League of Nations mandates — among them Palestine, Iraq, and Tanganyika — adding to holdings already covering India, huge swaths of Africa from the 19th-century Scramble for Africa, Australia and New Zealand, and Caribbean and Pacific territories. By the early 1920s the empire governs roughly a quarter of the globe's land area and population, the largest empire in recorded history by territory.

What it represents: Flags of the World says a plain Red Ensign was the proper ensign of any vessel registered in a British colony, and that Admiralty warrants authorised defaced Red Ensigns for overseas territories between 1882 and 1927 (including Palestine in 1927). The sources read do not mention 1919 or the post-WWI mandates as a turning point, nor the 'informal' colonial use stated here.

Attestedhow we know this

FOTW (colonial flags): a plain Red Ensign was the proper ensign of any vessel registered in a British colony, and the Admiralty authorised defaced Red Ensigns for overseas territories by warrant between 1882 and 1927 (North Borneo 1882, Kenya 1890, Canada 1892, Palestine 1927). Wikipedia (Red Ensign): the flag flown by British merchant ships since 1707, plain or defaced with a badge, allocated to merchantmen by an order in council of 1864.

Not established: Neither source treats 1919 or the post-war mandates as a turning point (Palestine's 1927 warrant is the only mandate named); the 'informal' territorial use stated on the page is not in them.

Paint guide
Proportions1:2.
LayoutRed field, Union Flag canton.
Red#CF142B
Blue#00247D
Blue Ensign, the standard government/colonial-administration flag of the second empire's expansion
1783 – 1919

"Second" British Empire (19th-century expansion)

Empire, expandingGeorge IIIChurch of England (UK only; no empire-wide religion)
Migration & conquest:Emigration: Irish Famine & 19th-century mass emigration
Ruling house:House of HanoverHouse of Windsor

Who & why: the shock of losing the Thirteen Colonies redirects British imperial ambition eastward and southward. The East India Company's growing territorial control over India (formalized as Crown rule, the British Raj, after the 1857 rebellion), the Scramble for Africa following the 1884–85 Berlin Conference, and the settlement of Australia (from 1788) and New Zealand (from 1840) together build what historians call the "Second" British Empire — larger, more formally administered, and more explicitly racialized in its governance than the first.

What it represents: the Blue Ensign becomes the colonial government flag, though not from 1783: Flags of the World says the Admiralty ruled in 1865 that colony-maintained vessels should fly a Blue Ensign with the colony's seal or badge in the fly (Wikipedia gives 1866 for the advice to colonies, citing the Colonial Naval Defence Act 1865) and that colonial flags and governors' flags date from 1869; Wikipedia adds that colonies began adopting their own badges in the first half of the 19th century. Nothing read says the Blue Ensign was the standard colonial flag from 1783.

Not yet checked against sourceshow we know this

FOTW (colonial flags): in 1865 the Admiralty ruled that vessels maintained by a colony under the Colonial Naval Defence Act should fly a Blue Ensign with the colony's seal or badge in the fly; colonial flags were introduced in 1869 with governors' flags. Wikipedia (Colonial Naval Defence Act 1865): in 1866 the Admiralty advised colonies that vessels under the Act must fly the Royal Navy Blue Ensign with the colony's seal or badge; Wikipedia's historical-flags list says colonies began adopting their own badges in the first half of the 19th century.

Not established: The Blue Ensign with a colonial badge is documented only from 1865-69, so the first eight decades of this era (1783-1865) are not covered and the 'standard from 1783' start is not stated; it was the government/naval vessel flag, not a flag for every colony or territory.

Paint guide
Proportions1:2.
LayoutBlue field, Union Flag canton.
Blue#00247D
Red#CF142B
the King's Colours / Grand Union pattern flown over the Thirteen Colonies before 1776
c. 1583 – 1783

"First" British Empire (early exploration and Atlantic colonies)

Empire, expandingElizabeth IChurch of England (established)
Migration & conquest:Immigration: transatlantic slave trade & indentured/convict transport (into the colonies)
Ruling house:House of TudorHouse of StuartHouse of Hanover

Who & why: Elizabethan-era exploration and privateering (Drake, Raleigh) opens the Atlantic to English ambition, and the East India Company's founding by royal charter in 1600 begins a commercial foothold in Asia that will later become the core of colonial India. The 17th and 18th centuries build a chain of North American and Caribbean colonies and a lucrative, morally catastrophic plantation and slave-trade economy in the Caribbean and American South. This first phase of empire ends abruptly with the loss of the Thirteen Colonies, confirmed by the 1783 Treaty of Paris after the American Revolutionary War.

What it represents: Wikipedia says early flags across the empire, including the Thirteen Colonies, tended to be variations of the Red and Blue Ensigns without colonial badges, and describes a Red Ensign with the first Union Jack in the canton used in British America until 1776 (de facto) / 1783 (de jure). Flags of the World dates the first Union Flag, St George's cross over St Andrew's, to 1606 and the addition of St Patrick's cross to 1 January 1801; the sources read do not support the page's 'after the 1707 Union' dating, and do not describe a 'King's Colours' flag.

Not yet checked against sourceshow we know this

Wikipedia (historical flags list): early colonial flags, including the Thirteen Colonies, were variations of the Red and Blue Ensigns without badges, and British America used a Red Ensign with the first Union Jack in the canton until 1776 (de facto) / 1783 (de jure). Wikipedia (Red Ensign): an English red ensign with the Cross of St George in the canton from the 1620s, used by Massachusetts from its founding (until the cross was removed after 1636), and a 1674 proclamation of Charles II confirmed it for English merchant ships. FOTW (United Kingdom): first Union Flag 1606 (St George over St Andrew), St Patrick's cross added 1 January 1801.

Not established: Both colonial-flag statements are Wikipedia only; FOTW's pages read (gb, gb-ensig, gb-colon, gb-hist) give nothing on colonial use before 1865. 'King's Colours / Grand Union pattern' is not in any source, and the c.1583 start is the page's own.

Paint guide
ProportionsNo fixed ratio recorded for most of this period; shown at 3:2.
LayoutSt George's cross (red on white) combined with St Andrew's cross (white diagonal on blue field, simplified here) after 1707; the pre-1801 form, without St Patrick's cross.
White#F4EFE1
Red#CF142B
PRE-IMPERIAL ENGLAND
placeholder — kingdom era, before overseas expansion begins
before c. 1583

Pre-imperial England

Kingdom, pre-imperialNo single ruler documentedCatholic, later Church of England (varied over centuries)
Ruling house:House of PlantagenetHouse of Tudor

Who & why: before Elizabethan-era exploration begins in earnest, England (and, separately, Scotland) exists as an ordinary medieval and early-modern kingdom with no overseas colonial holdings of consequence. This entry marks the baseline against which the empire's subsequent, extraordinarily rapid global expansion is measured.

What it represents: England's own flag of this era (St George's cross) is well documented but is covered in detail on this atlas's own United Kingdom, England, and Scotland pages rather than repeated here; shown as a placeholder marking pre-imperial England specifically.

Placeholder imagehow we know this

This page's own caption calls the image a placeholder: «placeholder — kingdom era, before overseas expansion begins».

Not established: Whether a flag, banner or standard existed in this period was not checked. The colour shown is not evidence of one.

Paint guide
ProportionsN/A — see this atlas's United Kingdom page for the domestic flag history of this era.

Reading the tags

Kingdom, pre-imperial — no overseas holdings yet
Empire, expanding — actively acquiring territory
Empire, dissolving — decolonization underway
Voluntary association — the post-imperial Commonwealth
Leader — the named ruler most associated with the era's start
State religion — the official/established faith, not the population's

More of the atlas

This page is one lineage in a larger set. This empire's reach touches dozens of this atlas's own country pages — nearly every one carrying a "British colony/protectorate" era in its own timeline descends from the history told here. A representative few:

Flags Atlas indexSearch every country and hub Empires hubEight transnational empires South Asia hubIndia and the subcontinent's own pages IrelandThe empire's oldest and closest colonial relationship AustraliaSettler-colonial expansion, "Second" empire
Compiled from Wikipedia, Flags of the World (fotw.info / crwflags.com), and Britannica. Colors are close historical approximations for painting reference; pre-19th-century swatches are informed reconstructions, not official specifications. Map is schematic and not surveyed.