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Bohemia is the westernmost and largest historical region of the Czech lands in the present-day Czech Republic. Bohemia can also refer to a wider area consisting of the historical Lands of the Bohemian Crown ruled by the Bohemian kings, including Moravia and Czech Silesia, in which case the smaller region is referred to as Bohemia proper as a means of distinction.

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The Czech lands or the Bohemian lands are the three historical regions of Bohemia, Moravia, and Czech Silesia. Together the three have formed the Czech part of Czechoslovakia since 1918, the Czech Socialist Republic since 1 January 1969 and the Czech Republic since 1 January 1993. The term which refers to these three lands is Czechia.

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The Egerland is a historical region in the far north west of Bohemia in the Czech Republic at the border with Germany. It is named after the German name Eger for the city of Cheb and the main river Ohře.

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Moravia is a historical region in the east of the Czech Republic and one of three historical Czech lands, with Bohemia and Czech Silesia.

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Opavian Silesia is a historical subregion of Silesia currently split between Poland and the Czech Republic.

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Prácheňsko is a historical and cultural region in the Czech Republic, covering roughly the Otava River basin, mostly in the northwest part of South Bohemia. It was an administrative region (kraj) in southwestern Bohemia, created in the late 13th century and abolished by the Austrian Empire's regional reform of 1848.

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Czech Silesia is the name given to the part of the historical region of Silesia located in the present-day Czech Republic. While not today an administrative entity in itself, Czech Silesia is, together with Bohemia and Moravia, one of the three historical Czech lands. In this context, it is often mentioned simply as "Silesia", even though it is only around one tenth of the area of the historic land of Silesia.

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Vogtland is a region spanning the German states of Bavaria, Saxony and Thuringia and north-western Bohemia in the Czech Republic. It overlaps with and is largely contained within Euregio Egrensis. The name alludes to the former leadership by the Vögte of Weida, Gera and Plauen.