Territory |
Purchased by |
Purchased from |
Cost |
Year |
Area |
Cost/Area |
Agreement (article) |
Isle of Man, Hebrides, Kintyre and islands of the Firth of Clyde[1][2] |
Scotland |
Norway |
4,000 marks sterling, 100 mark annuity |
1266 |
~8,000 km² |
~0.5 marks sterling/km² |
Treaty of Perth |
Dunkirk and Fort-Mardyck[3] |
France |
England |
5,000,000 livres |
1662 |
~44 km² |
~113,500 livres/km² |
Sale of Dunkirk |
Estonia, Livonia, Ingria, and Southeast Finland (Kexholmslän and part of Karelian Isthmus)[4][5] |
Russia |
Sweden |
2,000,000 silver Swedish riksdaler |
1721 |
~100,000 km² |
~2,000 Riksdaler/km² |
Treaty of Nystad |
Saint Croix[6][7] |
Denmark–Norway |
France |
750,000 livres |
1733 |
210 km² |
3571 livres/km² |
|
Louisiana[8] |
United States | France |
$15,000,000 USD |
1803 |
2,140,000 km² |
7 USD/km² |
Louisiana Purchase |
Florida[9] | United States | Spain |
$5,000,000 USD |
1819 |
~200,000 km² |
~5 USD/km² |
Adams–Onís Treaty |
Singapore[10] |
United Kingdom | Johor |
$60,000 Spanish dollars[11] |
1824 |
728 km² |
~82 Spanish dollars/km² |
|
Tranquebar, Serampore, and other continental holdings of Danish India[12] |
United Kingdom | Denmark |
125,000 GBP or 1,125,000 Danish krone |
1845 |
~44 km² |
~2840 GBP/km² or ~25,600 Kr/km² |
|
California, Nevada, Utah, Arizona |
United States | Mexico |
$18,250,000 USD |
1848 |
1,360,000 km² |
13.4 USD/km² |
Treaty of Guadalupe Hidalgo |
Southern Arizona and New Mexico[13] |
United States |
Mexico |
$10,000,000 USD |
1853 |
76,800 km² |
130 USD/km² |
Gadsden Purchase |
Danish Gold Coast[12] |
United Kingdom | Denmark |
10,000 GBP |
1850 |
~12,000 km² |
~1.2 GBP/km² |
|
Saxe-Lauenburg[14] |
Prussia |
Austria |
2,500,000 Danish rigsdaler[15] |
1865 |
1,000 km² |
2,500 Rigsdaler/km² |
Gastein Convention |
Alaska[16] |
United States |
Russia |
$7,200,000 USD |
1867 |
1,717,856 km² |
4 USD/km² |
Alaska Purchase |
Dutch Gold Coast[17] |
United Kingdom |
Netherlands |
46,939.62 Dutch guilders |
1872 |
|
|
Anglo-Dutch Treaties of 1870–1871 |
Saint Barthélemy[18] [19] |
France |
Sweden |
320,000 French francs |
1878 |
21 km² |
15,238 Francs/km² |
|
Philippines |
United States |
Spain |
$20,000,000 USD |
1898 |
300,000 km² |
20 USD/km² |
Treaty of Paris |
Caroline Islands[20] |
Germany |
Spain |
25,000,000 ESP |
1899 |
1,160 km² |
21,551 ESP/km² |
German–Spanish Treaty |
Palau[20] |
Mariana Islands[20] |
Cagayan Sulu and Sibutu |
United States |
Spain |
$100,000 USD |
1900 |
467 km² |
214 USD/km² |
Treaty of Washington |
Acre (state)[21] |
Brazil | Bolivia |
£2,000,000 |
1903 |
142,800 km² |
14 GBP/km² |
Treaty of Petrópolis |
Danish West Indies[22] | United States | Denmark |
$25,000,000 USD |
1916 |
400 km² |
62,500 USD/km² |
Treaty of the Danish West Indies |
Jäniskoski-Niskakoski territory[23][24] |
Soviet Union |
Finland |
700,000,000 FIM |
1947 |
176 km² |
700 FIM/km² |
|
Gwadar[25][26] |
Pakistan |
Muscat and Oman |
5,500,000,000 PKR |
1958 |
15,210 km²[27] |
20,754,716 PKR/km² |
Gwadar Purchase |
Elten, Selfkant, and Suderwick |
West Germany |
Netherlands |
280 million DM |
1963 |
69 km² |
4.1 million DM/km² |
Ausgleichsvertrag |
Tiran Island and Sanafir Island |
Saudi Arabia |
Egypt |
$22,000,000 USD in oil and development aid |
2017 |
113 km² |
|
Agreement of maritime delimitation between the Kingdom of Saudi Arabia and the Arab Republic of Egypt |