The current metro area population of Trenton in 2026 is 344,000, a 0.88% increase from 2025.

• The metro area population of Trenton in 2025 was 341,000, a 0.59% increase from 2024.
• The metro area population of Trenton in 2024 was 339,000, a 0.89% increase from 2023.
• The metro area population of Trenton in 2023 was 336,000, a 0.9% increase from 2022.