Bulgaria

Bulgaria is a country in Southeast Europe, classified by the United Nations under the M49 standard with code 100, ISO alpha-2 code BG, and ISO alpha-3 code BGR. The UN M49 overview places Bulgaria in the Europe region and the Eastern Europe subregion. Bulgaria is a UN member state. The World Bank capital field lists Sofia. These classification facts are stable and defined by international bodies, not by political preference. For any territorial or naming dispute, this page attributes the position to the relevant authority rather than asserting a claim.

Reference data for country codes

• UN M49 numeric code: 100
• ISO alpha-2: BG
• ISO alpha-3: BGR
• UN region: Europe
• UN subregion: Eastern Europe
• UN membership: Member state
• World Bank capital field: Sofia

Source: United Nations Statistics Division, UN M49 overview ( Verify the capital field via the World Bank country API (

How to verify the latest demographic figures

Demographic counts are a moving target. The most recent census in Bulgaria was conducted in 2021; the National Statistical Institute (NSI) reported roughly 6.52 million residents as of that census. The United Nations Population Division publishes annual estimates and projections; the 2024 revision gives a mid-2023 estimate of roughly 6.4 million. These numbers are not the same because they use different definitions, reference dates, and coverage.

For cross-country comparison, the World Bank demographic series draws on the UN World Population Prospects and national census data. When you cite a figure, name the source and the reference year. For example: “World Bank, 2023 estimate, 6.4 million.” Never mix a census count from one year with a projection from another without saying so.

Choosing a demographic source

Volatile figures — resident counts, currency, language statistics, government composition, economic indicators, and visa rules — change frequently. Do not treat any number in this guide as current if you need it for a decision. Instead, verify it against the named primary source and note the reference year. For economic and development indicators, the World Bank country API is a practical first stop: returns all country codes and names. For a single country, use to confirm the ISO code and basic metadata, then query the indicator API (for example, SP.POP.TOTL for total residents) to retrieve the most recent value with its stated year. The World Bank’s indicator metadata defines each series; the reference year appears in the API response alongside the value. For demographic or health figures, the WHO Global Health Observatory and UN Population Division update their estimates on different schedules, so always record the source and reference year for each number you cite.

Resident counts at a glance

• World Bank, 2023: 6,447,710
• 2021 census (NSI): 6,519,789 usual residents
• UN DESA World Population Prospects 2024, mid-2023 estimate: roughly 6.4 million
• UNFPA World Population Dashboard, 2024: roughly 6.4 million

Median age is above 44 years according to UN DESA World Population Prospects 2024. The nation has experienced negative natural increase and net emigration for decades. Estimates differ between Eurostat, UN DESA, and the national statistical institute because of migration assumptions and census adjustments.

Classification facts

These identifiers are stable and defined by international standard-setting bodies, not by political opinion:

• UN M49 code: 100
• ISO alpha-2: BG
• ISO alpha-3: BGR
• UN region: Europe
• UN subregion: Eastern Europe
• UN member state: Yes
• World Bank capital field: Sofia

The UN M49 classification is a statistical geography maintained by the United Nations Statistics Division. It groups countries for statistical convenience and does not imply any political or territorial claim. See the UN M49 overview at for the official list and methodology.

Capital

Sofia is the capital and largest city. The World Bank country profile lists the capital field as Sofia; the UN M49 overview does not define capitals. The capital is set by Bulgarian law, not by international standard. For geospatial reference, use ISO 3166-2:BG codes. Do not confuse the capital with the largest city by metropolitan area in official statistics.

Language

The official language is Bulgarian (ISO 639-1 code bg, ISO 639-2/3 code bul, Cyrillic script). Turkish and Roma are the largest minority languages. English is the most commonly spoken foreign language among younger people. Language policy, minority language status, and script standards are maintained by the Bulgarian language regulator and the Ministry of Education and Science. For current legal status, consult the official legislation or the Council of Europe’s language policy pages. Language statistics change with census methodology, so cite the source and year for any figure. Ethnologue and UNESCO provide supplementary data, but the national statistical office is the primary source for official language data.

Currency

The Bulgarian lev (BGN) is the official currency. The lev is pegged to the euro at 1.95583 BGN per EUR under a currency board arrangement managed by the Bulgarian National Bank (BNB). Bulgaria is preparing to adopt the euro; the official target is 1 January 2026, but the actual date depends on the European Commission convergence reports and Bulgarian political decisions. Do not treat the target date as a confirmed fact. Verify the current status with the BNB and the European Commission. The BNB publishes exchange rates and currency policy. Verify the current code and denominations from the BNB or the IANA currency registry.

Government

Bulgaria is a unitary parliamentary republic. The National Assembly (Narodno Sabranie) is the unicameral legislature. The head of state is the president; the head of government is the prime minister. The current constitution was adopted in 1991. The government formed after the June 2024 parliamentary election was confirmed in August 2024, with Rosen Zhelyazkov as prime minister. This is a snapshot; verify the current government and parliament on the official website of the National Assembly of the Republic of Bulgaria and the Council of Ministers. Do not rely on cached pages.

Economy

The World Bank classifies Bulgaria as an upper-middle-income economy (2024 classification). The economy is diversified, with services contributing about two-thirds of GDP, industry around a quarter, and agriculture a small share. Use the World Bank country API ( to pull the latest indicators. The API returns metadata and current values for GDP, income group, and regional classifications. Always note the reference year printed in the API response.

GDP figures are usually reported in current US dollars and in PPP international dollars; always note which measure you are using. In 2023, the World Bank reported Bulgaria’s GDP (current US$) at approximately 101.6 billion, GDP per capita (current US$) at roughly 15,700, and GNI per capita (Atlas method) at about USD 14,600. These figures are for reference only and should be checked against the latest World Bank release.

Distinctive claim

Bulgaria is the only EU member state that maintains a currency board arrangement with the euro while actively pursuing euro adoption, making its monetary policy path structurally different from both eurozone members and floating-rate EU economies.