Zagreb is the capital city of Croatia. It is located in the northwestern part of the country, along the Sava river. Known for its diverse cultural offerings and rich history, Zagreb is the largest city in Croatia and plays a significant role in its economy and scientific development. The city's architecture is a blend of old and new, with medieval structures like the Zagreb Cathedral coexisting with modern infrastructure. Key attractions include the Museum of Broken Relationships, St. Mark's Church, and the Croatian National Theatre.

The most recent census in Croatia was conducted in 2011, with the next one scheduled for 2021. According to the 2011 census, Zagreb had a population of 790,017. As the largest city in Croatia, Zagreb is also the most diverse, housing people from different ethnic groups and religions. According to the 2011 census, 93.14% of the population identified as Croat while 1.16% identified as Serbs. Regarding religious beliefs, 81.1% of the population identified as Catholic, 1.98% as Orthodox, 1.96% as atheist, and 0.96% as Muslim. The city is also home to a variety of languages, with Croatian being the official language.

Zagreb is divided into 17 city districts that are governed by city councils. The Zagreb Assembly is the legislative body of the City of Zagreb and is composed of 51 representatives. The Mayor of Zagreb, who has executive powers, is elected directly by the citizens. The city administration offices, institutions, and services have been organized in such a manner as to accommodate to the European standards and enable a more efficient, professional and transparent approach to businesses and citizens alike.

Zagreb is the richest city in Croatia, boasting a GDP per capita that is twice the Croatian average. The economy is dominated by the tertiary sector, with the largest revenues coming from trade and business services. The city houses many of the largest Croatian companies, as well as a significant number of international companies. It is also the headquarters of the Croatian National Bank and Zagreb Stock Exchange.

Zagreb has a well-developed infrastructure with a comprehensive public transportation system, including trams, buses, and a funicular railway. The city has made significant strides in planning for future growth, identifying priorities in areas such as digital connectivity, transport infrastructure, and sustainable energy solutions. The city's digital infrastructure has been a particular focus, with a growing number of businesses and households gaining access to high-speed broadband.