The current metro area population of Southend-On-Sea in 2025 is 323,000, a 0.62% increase from 2024.

• The metro area population of Southend-On-Sea in 2024 was 321,000, a 0.63% increase from 2023.
• The metro area population of Southend-On-Sea in 2023 was 319,000, a 0.95% increase from 2022.
• The metro area population of Southend-On-Sea in 2022 was 316,000, a 0.64% increase from 2021.