Malaysia was second with 25 million visitors, which was short of its target of 27.3 million.
Vietnam ranked third with 17.5 million visitors, followed by Singapore with 16.5 million and Indonesia with 13.9 million.
The rest included Cambodia with 6.7 million arrivals, the Philippines with 5.4 million, Laos with 4.1 million, and Myanmar with 1.06 million.
Thailand's tourism rebound was driven by several initiatives, including the introduction of permanent visa-free programs for Chinese and Indian tourists.
Southeast Asian countries have been competing to attract foreign tourists by easing visa policies.
Malaysia recently extended free visas for Chinese and Indian travelers until 2026, while Vietnam will offer 45-day visa-free travel for citizens of Poland, Czechia and Switzerland on package tours starting March 1.
Cambodia has reduced e-visa fees for tourists since January.