States and territories established in 1803

Ohio ( ) is a state in the Midwestern region of the United States. It borders the Canadian province of Ontario to the north (through Lake Erie), Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the west, and Michigan to the northwest. Of the 50 U.S. states, it is the 34th-largest by area. With a population of nearly 11.9 million, Ohio is the seventh-most populous and tenth-most densely populated state. Its capital and most populous city is Columbus, with other major metropolitan centers including Cleveland and Cincinnati, as well as Dayton, Akron,

The Grisons (; ) or Graubünden (), more formally the Canton Grisons, is one of the twenty-six cantons of Switzerland. It has eleven districts, and its capital is Chur. The German name of the canton, , translates as the "Grey Leagues", referring to the canton's origin in three local alliances, the Three Leagues. The other native names also refer to the Grey League: in Sutsilvan, in the other forms of Romansh, and in Italian. is the Latin name for the area. The Alpine ibex is the canton's heraldic symbol.

Ticino ( ), sometimes Tessin ( ), officially the Republic and Canton of Ticino, is one of the 26 cantons forming the Swiss Confederation. It is composed of eight districts and its capital city is Bellinzona. It is also traditionally divided into the Sopraceneri and the Sottoceneri, respectively north and south of Monte Ceneri.

Vaud ( ; , ), more formally Canton of Vaud (), is one of the 26 cantons forming the Swiss Confederation. It is composed of ten districts; its capital city is Lausanne. Its coat of arms bears the motto "Liberté et patrie" on a white-green bicolour.

Aargau ( , ), more formally the Canton of Aargau (; ; ; ), is one of the 26 cantons forming the Swiss Confederation. It is composed of eleven districts and its capital is Aarau.

canton of Switzerland

Thurgau ( , ; ; ; ), anglicized as Thurgovia, and formally as the Canton of Thurgau, is one of the 26 cantons forming the Swiss Confederation. It is composed of five districts. Its capital is Frauenfeld.

1803 acquisition by the U.S. of France's claim to the territory of Louisiana

principality

electorate

princely state in British Raj in India

oblast of the Russian Empire and RSFSR (1803-1922)

State of the Holy Roman Empire (1803–1806)

thumb|262px|Coat of arms of the Princes of Salm-Horstmar in 1903 Salm-Horstmar was a short-lived Napoleonic County in far northern North Rhine-Westphalia, Germany, located around Horstmar, to the northeast of Münster. It was created in 1803 for Wild- and Rhinegrave Wilhelm Frederick Charles Augustus of Salm-Grumbach (1799-1865), member of an ancient German House of Salm, following the loss of Grumbach and other territories west of the Rhine to France. The county was mediatised to the Kingdom of Prussia in 1813 and the Wild- and Rhinegrave was awarded a princely title within the Kingdom of Prus