1. United States (28%)
The United States is a federal republic composed of 50 states and a federal district. Located almost entirely in the Western Hemisphere, it consists of 48 contiguous states, with the capital being Washington, D.C., and the largest city, New York. The country is bordered by the Pacific Ocean to the west, the Atlantic Ocean to the east, Canada to the north, and Mexico to the south. Alaska, located in the northwest of North America, shares borders with Canada to the east and Russia to the west via the Bering Strait.
Hawaii is located in the Pacific Ocean. The U.S. also owns 14 territories scattered across the Caribbean and the Pacific. With an area of 3.79 million square miles (9.83 million km²) and a population of 327.1 million (as of 2018), the U.S. is the third-largest country in total area and the third most populous country in the world.
America is a nation of immigrants, with no single ethnic majority, making it one of the most racially diverse countries in the world. This diversity is a result of numerous migration waves from various parts of the world. In American films, it's common to see young people moving out on their own once they reach 18. In fact, statistics show that 28% of U.S. households consist of just one person, and nearly half of young adults in the country are single. In major cities like Manhattan or Washington, D.C., the percentage of people living alone can reach up to 50%.
The United States ranks third in the world by land area, covering 9,826,630 km². As of 2019, its population stands at 331,002,651, making it the third most populous country. The country's GDP per capita, according to the World Bank, was $59,532 in 2019.


2. Italy (29%)
Italy is a parliamentary republic in Southern Europe, with its territory extending into the central Mediterranean. The country’s two largest islands are Sicily and Sardinia. The Alps form the northern border of Italy, separating it from France, Switzerland, Austria, and Slovenia. San Marino and Vatican City are two independent states entirely surrounded by Italy.
Italy covers an area of 301,338 km², with a climate predominantly temperate and Mediterranean. Due to its boot-like shape, Italy is often referred to as 'Lo Stivale' (the boot). With a population of around 60 million, Italy is the third most populous country in the European Union. Its capital is Rome, with other major urban centers including Milan, Naples, and Turin.
Located between latitudes 35° and 47° North, and longitudes 6° and 19° East, Italy is bordered by France, Switzerland, Austria, and Slovenia to the north. Its southern borders consist of the Italian Peninsula, and the islands of Sicily and Sardinia, along with smaller surrounding islands. The country is bordered by the Adriatic, Ionian, Tyrrhenian, and Ligurian seas.
In Italy, 29% of households consist of just one person. The majority of the population is Roman Catholic. Recently, due to the global economic downturn, many adults in Italy have chosen to live alone to reduce expenses. With a total land area of 301,336 km², Italy ranks 71st in the world by size. In 2019, the country had a population of 60,461,826 and a population density of 194 people per square kilometer. Italy’s GDP per capita in 2019 was $31,953.


3. Japan (31%)
Japan is an island nation located in East Asia, situated in the Pacific Ocean. It lies on the eastern edge of the Sea of Japan, the East China Sea, and is bordered to the west by the Korean Peninsula, to the north by Russia's Far East via the Sea of Okhotsk, and to the south by Taiwan across the East China Sea.
Japan is an archipelago consisting of around 6,852 islands, with a predominantly temperate climate and distinct seasons. The country’s five main islands—Honshu, Hokkaido, Kyushu, Shikoku, and Okinawa—account for approximately 97% of its land area. However, much of the land is mountainous and forested, with limited mineral resources.
The country is divided into 47 prefectures, grouped into 8 geographical regions. Japan's population is around 126 million, making it the 11th most populous country in the world and the second-largest island nation. The majority of people live in narrow coastal plains. Ethnically, 98.1% of the population is Japanese.
Tokyo, Japan's unofficial capital, has a population of nearly 20 million, and the Greater Tokyo Area, including surrounding cities and provinces, is the world’s largest metropolitan area, with over 35 million residents and the highest urban economic output on the planet. Most Japanese people practice Shintoism, blended with Buddhism, and the country is known for its tradition of living in densely populated areas. Despite the high population density, 31% of Japanese adults live alone. This number has been steadily rising, and Japan is one of the world's most aged populations.
Japan covers an area of 379,954 km² with a population density of 335 people per square kilometer. As of 2019, its total population was 126,476,461. Japan's GDP per capita in 2019 was $38,428.


4. United Kingdom (34%)
The United Kingdom was a sovereign state that existed from 927 to 1707 in the northwest of Europe. At its height, the Kingdom extended over much of southern Great Britain (including England and Wales) and several distant islands. Today, it is governed under English and Welsh law, with a land border with Scotland to the north. Initially, the royal court was based in Winchester, Hampshire, but from the 12th century onward, London became the de facto capital of the kingdom. The Anglo-Saxons referred to themselves as 'Engle' or 'Angelcynn,' the ancestral term for the English people, and the land they inhabited was known as Engla, meaning 'the land of the Angles,' later Latinized to 'Anglia' by Æthelweard.
The term 'England' evolved from the medieval pronunciation of 'Engle-land' or 'Engelond.' The Latin name for the region was Anglia, and it was also referred to as 'Angleterre' in Old French and Anglo-Norman. By the 14th century, the name 'England' came to refer to the entire island of Great Britain.
In the UK, approximately 2.5 million people live alone in private homes, making up 34% of the population—over a third of the country. This trend has been on the rise since the 1990s. The land area of England (excluding Scotland, Northern Ireland, and Wales) is 130,395 km², and the estimated population is around 67,886,011 people. The GDP per capita in the UK is $39,720.


5. Sweden (47%)
Sweden, officially the Kingdom of Sweden (Swedish: Konungariket Sverige), is a Nordic country located in Northern Europe. It borders Norway to the west, Finland to the northeast, and connects to Denmark via the Öresund Bridge to the south, with the remaining borders surrounding the Baltic Sea and the Kattegat.
Covering an area of 449,964 km², Sweden is the third-largest country in the European Union, with a population of approximately 10.2 million, including about 2.4 million foreign-born individuals. While Sweden's population density is low at 21 people per km², the majority of the population is concentrated in the southern part of the country.
Roughly 85% of the population resides in urban areas, and this figure is expected to grow due to ongoing urbanization. The capital and largest city of Sweden is Stockholm. Gothenburg, the second-largest city, has around 500,000 residents, while Malmö, the third-largest, has approximately 260,000 residents. Sweden operates as a constitutional monarchy with a parliamentary system. Legislative power is held by the Riksdag, a unicameral parliament with 349 members, while executive power is vested in the government led by the Prime Minister. The country is divided into 21 counties and 290 municipalities.
Sweden ranks as one of the “loneliest” countries in the world, with a high standard of living, excellent social welfare, a strong education system, and a peaceful lifestyle. Although Sweden’s population is just over 10 million, 47% of its people live alone. With a medium-sized land area of 449,964 km² (ranking 54th globally), Sweden's population density is quite low at about 20 people per km². According to World Bank data, Sweden’s GDP per capita in 2019 was $53,442, placing it among the top 11 countries globally.


6. South Africa (24%)
South Africa, officially known as the Republic of South Africa, is a country located at the southern tip of the African continent. It shares borders with Namibia, Botswana, Zimbabwe, Mozambique, Swaziland, and is completely surrounded by the landlocked country of Lesotho. South Africa is a member of the Commonwealth of Nations.
South Africa has a unique history compared to other African nations, shaped by early European immigration and the strategic significance of the Cape Sea Route. European settlers first arrived after the Dutch East India Company established a trading post (which would later become Cape Town) in 1652. The closure of the Suez Canal during the Six-Day War highlighted the country's importance.
With its well-developed infrastructure, South Africa has been able to exploit its rich and valuable mineral resources, particularly during the 19th century when fierce competition occurred amid the Cold War. It is a highly diverse nation, home to the largest communities of white, Indian, and mixed-race people in Africa. The black population, who speak nine official languages as well as many other dialects, accounts for nearly 80% of the population.
In South Africa, 24% of adults choose to live alone, meaning that one in every five people opts for a solitary lifestyle — a notably high proportion. A recent study revealed that the high costs associated with marriage and cohabitation have led many to live independently to save on expenses.
The Republic of South Africa covers an area of 1,219,912 km², ranking 24th globally. In 2019, the country's population was approximately 59.3 million (ranked 25th in the world), yielding a population density of 36 people per km². According to the World Bank, South Africa's GDP per capita in 2019 was approximately $6,151.


7. Russia (25%)
Russia is a country with a rich history and unique cultural traditions. Visitors to Russia can immerse themselves in magnificent palaces and castles, or experience the vibrant and joyful music of the Russian people. The country’s artistic heritage is truly exceptional, offering an unforgettable experience.
Russia is vast, and this explains why the country boasts an array of breathtaking landscapes and a diverse, rich culture. The sheer size of Russia also accounts for many of the fascinating and distinctive features of the nation. If you travel to Russia with the professional visa services of Vietnam Booking, you’ll uncover hidden gems about the country that few people are familiar with.
In Russia, a little over one-quarter of adults choose to live alone. This rate is higher than in South Africa, though living in Russia is not difficult. In fact, the country has a long-standing and developed economy and culture. Despite this, many adults still prefer to live alone rather than cohabit with others.
Russia is the largest country in the world, covering 17,075,200 square kilometers, with a population density of just 8 people per square kilometer. In 2019, Russia’s population stood at 145.93 million. According to the World Bank, Russia's GDP per capita in 2019 was approximately $10,743.


8. Canada (26%)
Canada is a highly developed nation, ranking among the wealthiest countries in the world. It boasts the eighth-highest per capita income globally and the eleventh-highest Human Development Index. Canada also consistently ranks highly in international comparisons of education, government transparency, civil liberties, quality of life, and economic freedom.
Canada has two official languages: English, which is spoken by approximately 59% of the population, and French, the first language of around 23% of Canadians. About 18% of the population speaks other mother tongues, such as Chinese, Italian, German, Polish, Spanish, Portuguese, Punjabi, Ukrainian, Arabic, Dutch, Tagalog, Egyptian, Vietnamese, Cree, Inuktitut, and various others.
Despite being one of the most peaceful and livable countries in the Americas, Canada has a surprisingly high rate of adults living alone, with 26% of the adult population choosing solitude. Many of those who grow tired of living alone opt to become single parents, with statistics showing that approximately 8 out of 10 of them are single mothers.
As of 2019, Canada's population was estimated to be 37,742,154, with a land area of 9,984,670 square kilometers, making it the second-largest country in the world. Canada's GDP per capita in 2019 was a remarkable $45,032, according to the World Bank.

