The current metro area population of Kollam in 2025 is 2,252,000, a 3.21% increase from 2024.

• The metro area population of Kollam in 2024 was 2,182,000, a 3.56% increase from 2023.
• The metro area population of Kollam in 2023 was 2,107,000, a 4% increase from 2022.
• The metro area population of Kollam in 2022 was 2,026,000, a 4.38% increase from 2021.