Where in the world?
The flag of Montenegro has a red field with a gold border and the national coat of arms centered in the field.

Montenegro

Црна Гора

Population: 621,718

Region: Europe

Subregion: Southern Europe

Capital: Podgorica

Top Level Domain: .me

Currencies: Euro

Border countries

The flag of Albania has a red field with a black double-headed eagle in the center.

Albania

Population: 2,837,743

Region: Europe

Capital: Tirana
The flag of Bosnia and Herzegovina has a blue field with a yellow triangle and white stars along the hypotenuse.

Bosnia and Herzegovina

Population: 3,280,815

Region: Europe

Capital: Sarajevo
The flag of Croatia has three horizontal stripes of red, white, and blue with the national coat of arms in the center.

Croatia

Population: 4,047,200

Region: Europe

Capital: Zagreb
The flag of Kosovo has a blue field with a yellow map of Kosovo in the center and six white stars in an arc above the map.

Republic of Kosovo

Population: 1,775,378

Region: Europe

Capital: Pristina
The flag of Serbia has a red, blue, and white horizontal tricolor with a coat of arms on the left side.

Serbia

Population: 6,908,224

Region: Europe

Capital: Belgrade