This stage showcases the spirit of football in Thailand's highlands, where clubs represent the cultural and historical richness of the northern provinces.
[2] Chattrakan City earned promotion from the Thailand Semi-pro League and joined the Northern Region, adding fresh competition for this season.
[3] Kongkrailas United and Rongseemaechaithanachotiwat Phayao, despite meeting competitive criteria, were relegated to the Thailand Semi-pro League after failing to comply with licensing requirements.
[6] The distances between football clubs in the 2024–25 Thai League 3 Northern Region are approximate and calculated based on the most convenient and shortest practical road routes.
These measurements prioritize routes that balance proximity and ease of travel, avoiding too indirect or inconvenient paths despite their shorter distance.