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In 2026, the United Kingdom's population is projected at 69,931,528. That is up 40% from 50,121,017 in 1950. It is growing modestly, at +0.52% a year, adding about 364.3K people a year. Settlement is fairly dense, at 288 people/km². Half the population is younger than 40.2 years, and the age structure is steadily tilting older: the median is projected to reach 42.9 by 2050. The sexes are close to evenly balanced, at 97 males per 100 females. By 2100, UN projections see it rising to 74,305,411, up 6% from 2026.
Total population
69,931,528
Density
288 people/km²
Median age
40.2 years
Growth rate
+0.52%
The United Kingdom's population continues to grow, though at a moderate pace. The population is gradually aging, with median age projected to reach 43 by 2050 (up from 40 in 2026).