List of historical unrecognized states and dependencies
18th and 19th centuries

Name
Period
Today
Notes
Vermont Republic
1777–1791
Now part of the United States
Became the State of Vermont, territorial claims disputed by New York.
Watauga Association
1772–1778
Now part of the United States
Annexed into the State of North Carolina.
State of Muskogee
1799–1802
Part of the United States
A Native American state in Florida; consisted of several tribes of Creeks and Seminoles. Annexed by the United States.
Republic of South Haiti
1810
Now part of Haiti
Haiti declared its independence in 1804 under Jean Jacques Dessalines. That same year, Dessalines declared himself Emperor.
Republic of West Florida
1810
Now part of the United States
Republic consisting of the part of Louisiana now known as the Florida Parishes. Annexed during the presidency of James Madison.
Republic of Tucumán
1820
Part of Argentina
Now part of Argentine provinces of Catamarca, Santiago del Estero and Tucumán.
Entre Ríos ProvinceRepublic of Entre Ríos
1820–1821
Part of Argentina
Today the Argentine provinces of Entre Ríos and Corrientes.
Republic of Madawaska
1827–1842
Now divided between Canada and the United States
Within the provinces of New Brunswick, Quebec and the state of Maine.
Republic of Indian Stream
1832–1835
Now part of the United States
Annexed by the United States. Within the state of New Hampshire.
Riograndense Republic
1836–1845
Part of Brazil
The state was proclaimed by the Farroupilha rebels during the Ragamuffin War in 1836. The rebellion eventually failed and republic was dissolved.
Republic of Canada
1837–1838
Now part of Canada
The self-proclaimed government was established on Navy Island in the Niagara River in the latter days of the Upper Canada Rebellion
Republic of South Peru, Republic of North Peru and Peru–Bolivian Confederation
1836–1839
Now part of Argentina, Brazil, Bolivia, Chile, Colombia, Paraguay, Ecuador and Peru
The Peru–Bolivian Confederation (or Confederacy) was a confederate state that existed in South America between 1836 and 1839. Its first and only head of state, titled "Supreme Protector", was the Bolivian president, Marshal Andrés de Santa Cruz.
Republic of Lower Canada
1837–1838
Now part of Canada
A government established on the aftermath of Rebellions of 1837 in Lower Canada.
Republic of Los Altos
1837–1840
Now part of Guatemala
The United Provinces of Central America were riven by strife for much of their existence. Guatemala’s ruling class was appalled by the thought of an illiterate and brutish peasant Governor Rafael Carrera, and led the six western provinces into secession.
Juliana Republic
1839
Part of Brazil
Today's Santa Catarina.
Republic of the Río Grande
1840
Now part of the United States and Mexico.
Consisted of part of southern Texas and the 3 Mexican states of Coahuila, Nuevo León, and Tamaulipas.
Republic of Yucatán
1841–1843, 1846–1848
Part of Mexico
A state from 1841 to 1848, it was proclaimed after the Mexican government tried to centralize and tried to join the US during the Mexican–American War; it was rejected and joined a federal Mexico after the war ended.
California Republic
1846
Now part of the United States
Formed during an Anglo-American revolt in Mexican California during the Mexican–American War. This "state" never actually possessed a high level of organization, and was only in existence for a matter of weeks before the rebels deferred to the US government and American troops.
State of Deseret
1846
Now part of the United States
The State of Deseret was formed by Mormons(Latter-Day Saints) in 1849 before becoming Utah Territory in 1850. Advance Parties of Mormon Pioneers entered the Great Basin Area in 1846, and Vanguard Companys arrived in 1847.
Republic of Baja California
1853–1854
Now part of Mexico
The filibuster William Walker took control of La Paz, the capital of the sparsely populated Baja California, and 200 more men joined him.
Republic of Sonora
1854
Now part of Mexico
A lesser to William Walker's Republic of Baja California, it was a merger between that and Sonora.
Republic of South Carolina
1860–61
Now part of the United States
Secessionist state established on December 20, 1860 when South Carolina became the first state to secede from the United States. It lasted a month and a half before being a founding member of the Confederate States of America.
Alabama Republic
1861
Now Part of the United States
Secessionist republic declared January 11, 1861 when Alabama seceded from the United States. It only lasted a month before being a founding member of the Confederate States of America.
Kingdom of Araucanía and Patagonia
1860–1862
Now part of Argentina and Chile
Set up by a French adventurer who tried to gain legitimacy for his state, only to be denied. The self-proclaimed kingdom was mostly a legal fiction and did only loosely control a small portion of the territory it claimed.
Republic of Florida
1861
Now part of the United States
Secessionist state established January 10, 1861, when Florida seceded from the United States. Only lasted a month before being a founding member of the Confederate States of America.
Republic of Louisiana
1861
Now part of the United States
Secessionist state formed on January 11, 1861 when Louisiana seceded from the United States. It only lasted two and a half weeks before joining the Confederate States of America on February 8, 1861.
Republic of Mississippi
1861
Now part of the United States
Secessionist state established January 9, 1861 when Mississippi seceded from the United States. It only lasted a month before joining the Confederate States of America.
Republic of Texas
1861
Now part of the United States
Texas seceded from the United States on February 1, 1861 and lasted as an independent state for a month before joining the Confederate States of America.
Confederate States of America
1861–1865
Now part of the United States
Originally formed by seven southern states that seceded from the United States, it consisted of (South Carolina, Mississippi, Florida, Alabama, Georgia, Texas, and Louisiana).
Republic of Manitobah
1867–1869
Now part of Canada
Within the province of Manitoba.
Principality of Trinidad
1893–1895
Part of Brazil
American James Harden-Hickey divorced his wife in 1893 (1894?) and announced his intention to move to India and take up a life of Hindu asceticism.
Republic of Independent Guyana
1886–1891
Part of Amapa, Brazil
Established by French settlers in defiance of both France and Brazil.

Question: What is the Republic of Indian Stream?
Answer: The Republic of Indian Stream was an unrecognized constitution of the U.S. state of New Hampshire.