The current metro area population of Rio Branco in 2025 is 393,000, a 1.03% increase from 2024.

• The metro area population of Rio Branco in 2024 was 389,000, a 1.04% increase from 2023.
• The metro area population of Rio Branco in 2023 was 385,000, a 1.32% increase from 2022.
• The metro area population of Rio Branco in 2022 was 380,000, a 1.33% increase from 2021.