The current metro area population of Phra Nakhon Si Ayutthaya in 2025 is 470,000, a 1.08% increase from 2024.

• The metro area population of Phra Nakhon Si Ayutthaya in 2024 was 465,000, a 1.31% increase from 2023.
• The metro area population of Phra Nakhon Si Ayutthaya in 2023 was 459,000, a 1.32% increase from 2022.
• The metro area population of Phra Nakhon Si Ayutthaya in 2022 was 453,000, a 1.34% increase from 2021.