- Official language: Catalan
- Capital: Andorra la Vella
- Government: Parliamentary diarchy
- Population: 77,006 (2016)
- Area: 468 km2 (181 sq mi)
- Currency: Euro
- GDP (nominal): $2.827 billion (2015)
- GDP (PPP): $4.466 billion (2015)
- Human Development Index: 0.858 (2016) (very high)
Albania
- Official language: Albanian
- Capital: Tirana
- Government: Unitary parliamentary republic
- Population: 2,877,797 (2016)
- Area: 28,748 km2 (11,100 sq mi)
- Currency: Lek
- GDP (nominal): $11.146 billion (2016)
- GDP (PPP): $20.546 billion (2016)
- Human Development Index: 0.754 (2016) (high)
Armenia
- Official language: Armenian
- Capital: Yerevan
- Government: Unitary parliamentary republic
- Population: 2,974,076 (2016)
- Area: 29,800 km2 (11,500 sq mi)
- Currency: Dram
- GDP (nominal): $10.546 billion (2016)
- GDP (PPP): $19.154 billion (2016)
- Human Development Index: 0.743 (2016) (high)
Austria
- Official language: German
- Capital: Vienna
- Government: Federal parliamentary republic
- Population: 8,772,092 (2016)
- Area: 83,879 km2 (32,386 sq mi)
- Currency: Euro
- GDP (nominal): $366.336 billion (2016)
- GDP (PPP): $447.814 billion (2016)
- Human Development Index: 0.893 (2016) (very high)
Azerbaijan
- Official language: Azerbaijani
- Capital: Baku
- Government: Unitary semi-presidential republic
- Population: 9,949,537 (2016)
- Area: 86,600 km2 (33,400 sq mi)
- Currency: Manat
- GDP (nominal): $33.140 billion (2016)
- GDP (PPP): $71.744 billion (2016)
- Human Development Index: 0.750 (2016) (high)
Belarus
- Official language: Belarusian, Russian
- Capital: Minsk
- Government: Unitary presidential republic
- Population: 9,503,864 (2016)
- Area: 207,600 km2 (80,200 sq mi)
- Currency: Ruble
- GDP (nominal): $49.113 billion (2016)
- GDP (PPP): $111.364 billion (2016)
- Human Development Index: 0.793 (2016) (high)
Belgium
- Official language: Dutch, French, German
- Capital: Brussels
- Government: Federal parliamentary constitutional monarchy
- Population: 11,420,033 (2016)
- Area: 30,528 km2 (11,787 sq mi)
- Currency: Euro
- GDP (nominal): $459.670 billion (2016)
- GDP (PPP): $571.633 billion (2016)
- Human Development Index: 0.892 (2016) (very high)
Bosnia and Herzegovina
- Official language: Bosnian, Croatian, Serbian
- Capital: Sarajevo
- Government: Federal parliamentary republic
- Population: 3,839,737 (2016)
- Area: 51,209 km2 (19,772 sq mi)
- Currency: Mark, Convertible mark
- GDP (nominal): $17.155 billion (2016)
- GDP (PPP): $30.706 billion (2016)
- Human Development Index: 0.758 (2016) (high)
Bulgaria
- Official language: Bulgarian
- Capital: Sofia
- Government: Unitary parliamentary republic
- Population: 7,084,563 (2016)
- Area: 110,994 km2 (42,855 sq mi)
- Currency: Lev
- GDP (nominal): $51.314 billion (2016)
- GDP (PPP): $115.134 billion (2016)
- Human Development Index: 0.782 (2016) (high)
Croatia
- Official language: Croatian
- Capital: Zagreb
- Government: Unitary parliamentary republic
- Population: 4,190,669 (2016)
- Area: 56,594 km2 (21,851 sq mi)
- Currency: Kuna
- GDP (nominal): $51.584 billion (2016)
- GDP (PPP): $93.565 billion (2016)
- Human Development Index: 0.816 (2016) (very high)