The current metro area population of Osaka in 2026 is 18,874,000, a 0.25% decline from 2025.

• The metro area population of Osaka in 2025 was 18,922,000, a 0.24% decline from 2024.
• The metro area population of Osaka in 2024 was 18,967,000, a 0.24% decline from 2023.
• The metro area population of Osaka in 2023 was 19,013,000, a 0.25% decline from 2022.