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For the mirror universe counterpart, see Terran Empire.

United Earth
The Seal of United Earth.
Capital planet: Earth
Capital city: London (c. 2150s)
Other major cities: New York City,
San Francisco,
Mexico City,
Cape Town,
Executive (head of state): President of United Earth
(Lydia Littlejohn, c. 2161)
Executive (head of government): Prime Minister of United Earth
(Nathan Samuels, c. 2155–2161)
Legislature: Parliament of United Earth
Federation Councillor: Matthew Mazibuko (c. 2370s, 2380s)
Establishing document: Traité d'Unification
Date of establishment: 2130
(Traité d'Unification signed);
14 July 2150
(final unification)
Date of Federation membership: 12 August 2161 (Founding Member State)
Notable colonies: Luna,
Terra Nova,
Alpha Centauri,
Proxima Centauri,
Vega IX,
Alpha III,
Alpha V,
Domestic space force: United Earth Starfleet
Domestic service: Earth Surface Forces
Adjacent members: Vulcan, Tellar, Alpha Centauri, Andoria
Population: 10.7 billion (Humanoid);
8.1 million (Cetacean)
Languages: English; Mandarin, Spanish, Arabic, French, Russian
Holidays: Unification Day
(July 14),
First Contact Day (April 5),
Federation Day (August 12),
Christmas (December 25)
Religions: None (Atheism)
The Flag of United Earth

United Earth is one of the founding Member States of the United Federation of Planets and the planetary state for Earth.

United Earth is a parliamentary republic headed by a President.

As head of state, and a Prime Minister who is the head of government.

Members of the United Earth Cabinet receive the title of "Minister."

In 2155, the United Earth Prime Minister's office was located in London, as was the President's office in 2160.

In the 2150s, the United Earth Parliament building was located in Paris.

The Prime Minister also maintained an office in Paris near the Place de la Concorde.

United Earth was responsible for the creation of the Coalition of Planets in 2155.

United Earth Prime Minister Nathan Samuels began the initial talks the previous year and presided over the signing of the Coalition Compact.

On the floor of the United Earth Parliament chamber. United Earth Interior Minister Haroun al-Rashid, who would later go on to serve as the first Federation President, was also a significant representative in the Coalition talks.

After fighting a war with the Romulan Star Empire, United Earth was one of the five founding states of the Federation, with its citizens being amongst the primary architects of the Articles of the Federation.

In the 2150s, United Earth's primary defense agency was the Military Assault Command Organization, with the United Earth Starfleet eventually being pressed into the role of planetary defense during the Xindi crisis.

Internal security was the purview of the Earth Security Agency.

Earth Surface Forces served as the domestic security organization for the planet through the early part of the 23rd century.

The leaders of the United Earth civil government were criticized by investigators for their inaction during "the Leyton Affair" in 2372.

References to Earth security forces being 'federalized' by President Jaresh-Inyo in "Homefront" and "Paradise Lost" were originally intended to appear, but were cut for time.

In the late 32nd century, in the wake of the cataclysm known as The Burn (where dilithium stores throughout the galaxy simultaneously detonated, causing widespread destruction), United Earth seceded from the Federation and once again became a sovereign entity. The United Earth Defense Force was then created to see to the defense of the independent Earth. (DSC episode: "People of Earth")

High-ranking United Earth officials[]

  • Lydia Littlejohn - President of United Earth c. 2161
  • Nathan Samuels - Prime Minister of United Earth, c. 2155
  • Haroun al-Rashid - United Earth Interior Minister, c. 2155
  • Thomas Vanderbilt - United Earth Defense Minister, c. 2155



  • Earth
  • Luna
  • Mars
  • Terra Nova
  • Centauri III
  • Vega IX
  • Alpha III
  • Alpha V
  • Deneva
  • Calder II
  • Gault
  • Tarod IX
  • Caldos II
  • Altair VI
  • Berengaria VII

Stars and Star systems[]

  • Sol System
  • Alpha Centauri
  • Proxima Centauri
  • Vega System
  • Deneva System
  • Tau Ceti
  • Terra Nova

Military organizations[]

Note: Some of these defense organizations could have been integrated into Federation Starfleet and other Federation defense organizations (such as Federation Naval Patrol) after the founding of the United Federation of Planets.

Alternate timelines[]

In an alternate timeline where the attack on San Francisco by Terra Prime was successful, the Isolationist Party took control of Earth’s parliament, and in 2161, opted not to have the United Earth join in an alliance with the Vulcans, Andorians and Tellarites. Instead, United Earth remained an independent stellar power well into the mid 23rd century and significant rival of the Interstellar Coalition, the union eventually formed by the coming together of the Vulcans, Andorians, Tellarites and Denobulans. In this timeline, United Earth exploited ideological and philosophical differences on Halka and in the Rigel star system so as to continue its mining operations unopposed; the exploitation was the cause of much heated debate when Humans petitioned to join the Interstellar Coalition in 2264.

As of 2264, colony worlds of United Earth included Mars, Vega colony, Aldebaran Colony, Benecia Colony, Ivor Prime, Tarsus IV and Epsilon Canaris III. Secessionist or independence movements existed (or had existed) on worlds such as Mars and Epsilon Canaris III. However, they were quickly quelled by the government of United Earth.

In addition to colony worlds, United Earth, by the mid 23rd century, had spheres of influence which included Canopus Planet, Halka, Neural, Rigel IV, Rigel V, and Rigel VII. (TOS - Myriad Universes novel: A Less Perfect Union)