The current metro area population of Cardiff in 2025 is 495,000, a 0.61% increase from 2024.

• The metro area population of Cardiff in 2024 was 492,000, a 0.82% increase from 2023.
• The metro area population of Cardiff in 2023 was 488,000, a 0.62% increase from 2022.
• The metro area population of Cardiff in 2022 was 485,000, a 0.83% increase from 2021.