<Table> <Tr> <Th> Date </Th> <Th> Event </Th> <Th> Change Map </Th> </Tr> <Tr> <Th> July 4 , 1946 </Th> <Td> The Commonwealth of the Philippines became independent as the Republic of the Philippines . </Td> <Td> Pacific Ocean : </Td> </Tr> <Tr> <Th> July 18 , 1947 </Th> <Td> The United Nations entrusted the Trust Territory of the Pacific Islands to the United States . </Td> <Td> Pacific Ocean : </Td> </Tr> <Tr> <Th> January 1 , 1949 </Th> <Td> The Tokelau Islands were incorporated into New Zealand , which inherited the claims on Atafu , Fakaofo , and Nukunono . </Td> <Td> Pacific Ocean : </Td> </Tr> <Tr> <Th> August 1 , 1950 </Th> <Td> Guam was organized into a civil territory . </Td> <Td> no change to map </Td> </Tr> <Tr> <Th> August 3 , 1950 </Th> <Td> Kansas and Missouri exchanged small portions of land along the Missouri River , due to shifts in the river following a flood in 1944 . </Td> <Td> </Td> </Tr> <Tr> <Th> April 11 , 1955 </Th> <Td> Panama 's corridor connecting Colón with the rest of Panama was realigned within the Panama Canal Zone . Several three - dimensional `` tubes '' of sovereignty were also created , allowing Panamanian bridges to pass over rivers and a highway at several locations within the Canal Zone . </Td> <Td> too small to map </Td> </Tr> <Tr> <Th> August 23 , 1955 </Th> <Td> Several border locations of the Panama Canal Zone were redefined . Punta Paitilla , the land held on Taboga Island , and the remaining American holdings in Colón and Panama City were ceded to Panama . </Td> <Td> Caribbean Sea : </Td> </Tr> <Tr> <Th> January 3 , 1959 </Th> <Td> The Alaska Territory was admitted as the forty - ninth state , Alaska . </Td> <Td> Northwestern North America : </Td> </Tr> <Tr> <Th> August 21 , 1959 </Th> <Td> Most of Hawaii Territory was admitted as the fiftieth state , Hawaii . Palmyra Atoll was excluded from statehood and remained a territory . </Td> <Td> Pacific Ocean : </Td> </Tr> <Tr> <Th> August 25 , 1961 </Th> <Td> About 20 acres of land was transferred from Minnesota to North Dakota near Fargo , North Dakota ; since the area was very small and poorly documented , it is not mapped . </Td> <Td> too small to map </Td> </Tr> <Tr> <Th> January 14 , 1964 </Th> <Td> The Chamizal , a tract of land between El Paso , Texas , and Ciudad Juárez , Chihuahua , was divided between the United States and Mexico . </Td> <Td> </Td> </Tr> <Tr> <Th> August 4 , 1965 </Th> <Td> The Cook Islands became self - governing from New Zealand . It claimed the atolls of Pukapuka , Manihiki , Penrhyn , and Rakahanga . </Td> <Td> Pacific Ocean : </Td> </Tr> <Tr> <Th> April 25 , 1971 </Th> <Td> The lease of the Corn Islands from Nicaragua was terminated . </Td> <Td> no change to map </Td> </Tr> <Tr> <Th> September 1 , 1972 </Th> <Td> The United States recognized the sovereignty of Honduras over the Swan Islands . </Td> <Td> Caribbean Sea : </Td> </Tr> <Tr> <Th> March 1 , 1977 </Th> <Td> The United States claimed maritime borders west of the Strait of Juan de Fuca , within the Dixon Entrance , and in the Beaufort Sea that conflicted with claims of Canada . </Td> <Td> no change to map </Td> </Tr> <Tr> <Th> May 26 , 1977 </Th> <Td> Several parcels were exchanged between Texas and Mexico along the Rio Grande in areas near Presidio and Hidalgo , Texas , including the Horcón Tract , on which the town of Río Rico was located , and Beaver Island near Roma , Texas . In addition , Mexico ceded 823 acres ( 3.33 km ) to the U.S. , while the U.S. ceded 2,177 acres ( 8.81 km ) to Mexico , primarily to straighten sections of the Rio Grande for flood control . </Td> <Td> </Td> </Tr> <Tr> <Th> October 1 , 1978 </Th> <Td> Tuvalu became independent from the United Kingdom . It claimed the atolls of Funafuti , Nukufetau , Nukulaelae , and Niulakita . </Td> <Td> Pacific Ocean : </Td> </Tr> <Tr> <Th> July 12 , 1979 </Th> <Td> The Republic of Kiribati became independent from the United Kingdom . It claimed Birnie Island , Canton Island , Caroline Island , Christmas Island , Enderbury Island , Flint Island , Gardner Island , Hull Island , Malden Island , McKean Island , Phoenix Island , Starbuck Island , Sydney Island , and Vostok Island . This dissolved the condominium of the Canton and Enderbury Islands . </Td> <Td> Pacific Ocean :
<Table> <Tr> <Th> Date </Th> <Th> Event </Th> <Th> Change Map </Th> </Tr> <Tr> <Th> July 4 , 1946 </Th> <Td> The Commonwealth of the Philippines became independent as the Republic of the Philippines . </Td> <Td> Pacific Ocean : </Td> </Tr> <Tr> <Th> July 18 , 1947 </Th> <Td> The United Nations entrusted the Trust Territory of the Pacific Islands to the United States . </Td> <Td> Pacific Ocean : </Td> </Tr> <Tr> <Th> January 1 , 1949 </Th> <Td> The Tokelau Islands were incorporated into New Zealand , which inherited the claims on Atafu , Fakaofo , and Nukunono . </Td> <Td> Pacific Ocean : </Td> </Tr> <Tr> <Th> August 1 , 1950 </Th> <Td> Guam was organized into a civil territory . </Td> <Td> no change to map </Td> </Tr> <Tr> <Th> August 3 , 1950 </Th> <Td> Kansas and Missouri exchanged small portions of land along the Missouri River , due to shifts in the river following a flood in 1944 . </Td> <Td> </Td> </Tr> <Tr> <Th> April 11 , 1955 </Th> <Td> Panama 's corridor connecting Colón with the rest of Panama was realigned within the Panama Canal Zone . Several three - dimensional `` tubes '' of sovereignty were also created , allowing Panamanian bridges to pass over rivers and a highway at several locations within the Canal Zone . </Td> <Td> too small to map </Td> </Tr> <Tr> <Th> August 23 , 1955 </Th> <Td> Several border locations of the Panama Canal Zone were redefined . Punta Paitilla , the land held on Taboga Island , and the remaining American holdings in Colón and Panama City were ceded to Panama . </Td> <Td> Caribbean Sea : </Td> </Tr> <Tr> <Th> January 3 , 1959 </Th> <Td> The Alaska Territory was admitted as the forty - ninth state , Alaska . </Td> <Td> Northwestern North America : </Td> </Tr> <Tr> <Th> August 21 , 1959 </Th> <Td> Most of Hawaii Territory was admitted as the fiftieth state , Hawaii . Palmyra Atoll was excluded from statehood and remained a territory . </Td> <Td> Pacific Ocean : </Td> </Tr> <Tr> <Th> August 25 , 1961 </Th> <Td> About 20 acres of land was transferred from Minnesota to North Dakota near Fargo , North Dakota ; since the area was very small and poorly documented , it is not mapped . </Td> <Td> too small to map </Td> </Tr> <Tr> <Th> January 14 , 1964 </Th> <Td> The Chamizal , a tract of land between El Paso , Texas , and Ciudad Juárez , Chihuahua , was divided between the United States and Mexico . </Td> <Td> </Td> </Tr> <Tr> <Th> August 4 , 1965 </Th> <Td> The Cook Islands became self - governing from New Zealand . It claimed the atolls of Pukapuka , Manihiki , Penrhyn , and Rakahanga . </Td> <Td> Pacific Ocean : </Td> </Tr> <Tr> <Th> April 25 , 1971 </Th> <Td> The lease of the Corn Islands from Nicaragua was terminated . </Td> <Td> no change to map </Td> </Tr> <Tr> <Th> September 1 , 1972 </Th> <Td> The United States recognized the sovereignty of Honduras over the Swan Islands . </Td> <Td> Caribbean Sea : </Td> </Tr> <Tr> <Th> March 1 , 1977 </Th> <Td> The United States claimed maritime borders west of the Strait of Juan de Fuca , within the Dixon Entrance , and in the Beaufort Sea that conflicted with claims of Canada . </Td> <Td> no change to map </Td> </Tr> <Tr> <Th> May 26 , 1977 </Th> <Td> Several parcels were exchanged between Texas and Mexico along the Rio Grande in areas near Presidio and Hidalgo , Texas , including the Horcón Tract , on which the town of Río Rico was located , and Beaver Island near Roma , Texas . In addition , Mexico ceded 823 acres ( 3.33 km ) to the U.S. , while the U.S. ceded 2,177 acres ( 8.81 km ) to Mexico , primarily to straighten sections of the Rio Grande for flood control . </Td> <Td> </Td> </Tr> <Tr> <Th> October 1 , 1978 </Th> <Td> Tuvalu became independent from the United Kingdom . It claimed the atolls of Funafuti , Nukufetau , Nukulaelae , and Niulakita . </Td> <Td> Pacific Ocean : </Td> </Tr> <Tr> <Th> July 12 , 1979 </Th> <Td> The Republic of Kiribati became independent from the United Kingdom . It claimed Birnie Island , Canton Island , Caroline Island , Christmas Island , Enderbury Island , Flint Island , Gardner Island , Hull Island , Malden Island , McKean Island , Phoenix Island , Starbuck Island , Sydney Island , and Vostok Island . This dissolved the condominium of the Canton and Enderbury Islands . </Td> <Td> Pacific Ocean :
which is the most recent state to have joined the united states of america
which is the most recent state to have joined the united states of america
Hawaii
Hawaii