The current metro area population of Qazvin in 2026 is 450,000, a 1.12% increase from 2025.

• The metro area population of Qazvin in 2025 was 445,000, a 1.14% increase from 2024.
• The metro area population of Qazvin in 2024 was 440,000, a 1.15% increase from 2023.
• The metro area population of Qazvin in 2023 was 435,000, a 1.16% increase from 2022.