The UK population was about 69.5 million in 2025 , and a 2026 estimate puts it at about 69.9 million. The official UK statistics release gives a provisional mid-2025 figure of 69,487,000 , and a 2026 population estimate shows 69,931,528.

Quick Scoop

  • 2025: 69.5 million people in the UK, provisional estimate.
  • 2026: about 69.9 million people in the UK, estimate as of Jan 1, 2026.
  • That means the UK added roughly 0.4 million people between those two points.

What this means

The numbers are close, but they come from different statistical sources and methods, so they may not match exactly. The UK’s official population estimate is the best figure to use for 2025, while the 2026 number is a projected or model-based estimate.

Tiny takeaway

UK population: around 69.5 million in 2025 and around 69.9 million in 2026.

TL;DR: The UK had about 69.5 million people in 2025 and about 69.9 million in 2026.