In 2023, the population of the United Kingdom reached 68.3 million, compared with 67.6 million in 2022. The UK population has more than doubled since 1871 when just under 31.5 million lived in the UK and has grown by around 8.2 million since the start of the twenty-first century. For most of the twentieth century, the UK population steadily increased, with two noticeable drops in population occurring during World War One (1914-1918) and in World War Two (1939-1945). Demographic trends in postwar Britain After World War Two, Britain and many other countries in the Western world experienced a 'baby boom,' with a postwar peak of 1.02 million live births in 1947. Although the number of births fell between 1948 and 1955, they increased again between the mid-1950s and mid-1960s, with more than one million people born in 1964. Since 1964, however, the UK birth rate has fallen from 18.8 births per 1,000 people to a low of just 10.2 in 2020. As a result, the UK population has gotten significantly older, with the country's median age increasing from 37.9 years in 2001 to 40.7 years in 2022. What are the most populated areas of the UK? The vast majority of people in the UK live in England, which had a population of 57.7 million people in 2023. By comparison, Scotland, Wales, and Northern Ireland had populations of 5.44 million, 3.13 million, and 1.9 million, respectively. Within England, South East England had the largest population, at over 9.38 million, followed by the UK's vast capital city of London, at 8.8 million. London is far larger than any other UK city in terms of urban agglomeration, with just four other cities; Manchester, Birmingham, Leeds, and Glasgow, boasting populations that exceed one million people.

In May 2025, Instagram had almost ***** million users in the United Kingdom (UK). The largest share of Instagram users were individuals aged between 25 and 34 years old, at **** percent. This was followed by the category of users aged 18 to 24 years. Individuals over 65 years old, were less likely to use the social media platform, making up the smallest share of Instagram users during this period. Leading social media in the UK According to figures based on approximately ******* billion hits online per month, Facebook was the leading social media website in the UK as of November 2024, holding over ***** percent of the social media market share. This was followed by Instagram and X (formerly known as Twitter). The Pinterest website ranked fourth during that period, with a market share of **** percent. Facebook: Leader in the UK The number of social network users in the UK experienced an increase of roughly *** million users between 2018 and 2023. The share of female Facebook users is slightly higher than the number of male users. At ********* of respondents, individuals aged between 25 and 34 years old made up the largest share of Facebook users in the UK. This was followed by roughly **** percent of users within the 35 to 44 years old category. Facebook usage appeared to be the lowest among those aged 65 and older.

The crime rate in the United Kingdom was highest in England and Wales in 2024/25, at **** crimes per 1,000 people, compared with Scotland, which had **** crimes per 1,000 population, and Northern Ireland, at **** crimes per 1,000 people in 2023/24. During this time period, the crime rate of England and Wales has usually been the highest in the UK, while Scotland's crime rate has declined the most, falling from **** crimes per 1,000 people in 2002/03, to just **** by 2021/22. Overall crime on the rise In 2024/25, there were approximately **** million crimes recorded by the police in England and Wales. Although this was a slight decline on the previous two years, it was still far higher than during the mid-2010s. While crime declined quite significantly between 2002/03 and 2013/14, this trend went into reverse in subsequent years. While there are no easy explanations for the recent uptick in crime, it is possible that reduced government spending on the police service was at least partly to blame. In 2009/10, for example, government spending on the police stood at around **** billion pounds, with this cut to *****billion in 2013/14. One of the most visible consequences of these cuts was a sharp reduction in the number of police officers in the UK. Between 2010 and 2017, the number of officers fell by 20,000, although the number of officers returned to pre-austerity levels by the 2020s. A creaking justice system During the period of austerity, the Ministry of Justice as a whole saw its budget sharply decline, from *** billion pounds in 2009/10 to just **** billion by 2015/16. Although there has been a reversal of the cuts to budgets and personnel in the justice system, the COVID-19 pandemic hit the depleted service hard in 2020. A backlog of cases grew rapidly, putting a strain on the ability of the justice system to process cases quickly. In 2022, for example, it took on average *** days for a crown court case to go from offence to conclusion, compared with *** days in 2018. There is also the issue of overcrowding in prisons, with the number of prisoners in England and Wales dangerously close to operational capacity in recent years.