The current metro area population of Diwaniyah in 2025 is 611,000, a 3.21% increase from 2024.

• The metro area population of Diwaniyah in 2024 was 592,000, a 3.5% increase from 2023.
• The metro area population of Diwaniyah in 2023 was 572,000, a 3.44% increase from 2022.
• The metro area population of Diwaniyah in 2022 was 553,000, a 3.75% increase from 2021.