Robert K Lockwood

World Population 2025 Theme. This year, the day is being observed on thursday, july 11, 2025, with the theme “leave no one behind, count everyone,” which emphasises the importance of inclusive data collection to ensure that everyone is fairly represented in population. Un secretary general's message for 2025.

The animation shows the southern hemisphere between 14 july and 6 september 2025. Leave no one behind, count everyone is the theme for world population day 2025.