The United States of Colombia was the name adopted in 1861 through the Rionegro Constitution for the nation which had been known as the Republic of New Granada

Republic of New Granada

The Republic of New Granada was a centralist republic consisting primarily of present-day Colombia and Panama with smaller portions of today's Ecuador, and Venezuela. It was created after the dissolution in 1830 of Gran Colombia. It was later abolished in 1858 when the Granadine Confederation was...

 since the dissolution of the federation of Gran Colombia

Gran Colombia

Gran Colombia is a name used today for the state that encompassed much of northern South America and part of southern Central America from 1819 to 1831. This short-lived republic included the territories of present-day Colombia, Venezuela, Ecuador, Panama, northern Peru and northwest Brazil. The...

 in 1830-1831.

The nine original states

States of Colombia

States of Colombia existed from February 27, 1855 in the Republic of New Granada and the Granadine Confederation, were they were called "federal states"...

 that formed the confederation were:

• Antioquia State
  Antioquia State
  Antioquia State was one of the states of Colombia. Today the area of the former state makes up most of modern day Antioquia Department, Colombia.- Limits :In 1863 it bordered:* Santander State and Boyacá State in the East.* Tolima State in the South....
  
  ,
• Bolívar State
  Bolívar State (Colombia)
  Bolívar State was one of the states of Colombia. Today the area of the former state makes up most of modern day Bolívar Department, Sucre Department, Córdoba Department and Atlántico Department in northern Colombia.- Limits :In 1863 it bordered:...
  
  ,
• Boyacá State
  Boyacá State
  Boyacá State was one of the states of Colombia.- Naming :* 1857-06-15 create under the name Estado Federal de Boyacá .* 1858 recognized as Estado de la Federación in the 1858 constitution of the Granadine Confederation,...
  
  ,
• Cauca State
  Cauca State
  Cauca State was one of the states of Colombia.Today the area of the former state makes up most of modern day west and southern Colombia, with some portion of its vast territories acquired by present day Peru, Brazil, Ecuador and Venezuela.- Naming :...
  
  ,
• Cundinamarca State
  Cundinamarca State
  Cundinamarca State was one of the states of Colombia. It was created on 15 June 1857 as Estado Federal de Cundinamarca , in 1858 was recognized as Estado de la Federación, and in the constitution of 1863 re-named as Estado Soberano of the United States of Colombia.- Subdivisions :With the law of...
  
  ,
• Magdalena State
  Magdalena State
  The Magdalena State was one of the states of Colombia. Today the area of the former state makes up most of modern-day areas of the departments of Magdalena, Cesar and La Guajira, northern Colombia.- Provinces :* El Banco Province...
  
  ,
• Panama State
  Panama State
  Panamá State was one of the states of Colombia. Created 27 February 1855 under the name Estado Federal de Panamá...
  
  ,
• Santander State
  Santander State
  Santander State was one of the states of Colombia. Today the area of the former state makes up most of modern day areas of the Santander Department and Norte de Santander Department in northeastern Colombia.- Limits :In 1863 it bordered:...
  
   and
• Tolima State
  Tolima State
  Tolima State was one of the states of Colombia .On July 12, 1861, after raising in arms against the constitutional government of the president Mariano Ospina Rodríguez, the general Tomas Cipriano de Mosquera created the Tolima State, carved out of Cundinamarca State.In 1863 it bordered:* Cauca...
  
  ,

and the territories were:

• Caquetá Territory
  Caquetá Territory
  Caquetá Territory was a territory of the United States of Colombia.In the North it bordered San Martín Territory.In the 1863 constitution it was part of Cauca State....
  
  ,
• San Martin Territory
  San Martín Territory
  San Martín Territory was one of the territories of the United States of Colombia.In the South it bordered Caquetá Territory.- Timeline :* 1832 part of Bogotá Province as San Martín Territory.* 1844 part of Cundinamarca State as San Martín Territory....
  
  ,
• Nevada Territory and
• Motilones Territory.

After several years of intermittent civil wars, in 1886 the party led by Rafael Núñez

Rafael Núñez (politician)

Rafael Wenceslao Núñez Moledo was a Colombian author, lawyer, journalist and politician, who was elected President of Colombia in 1880 and in 1884. Rafael Núñez was born in Cartagena de Indias, on September 28, 1825. He died in Cartagena on September 18, 1894.-Early life:Little is known about the...

 proclaimed a new constitution of centralist character that abolished the United States of Colombia and created the Republic of Colombia.