Thailand is a monarchy.
Thailand ( [ ˈtaɪlænd ] or [ ˈtaɪlənd ] ; [ : wikt : ประเทศไทย , ประเทศไทย ] , , [ pra.tʰêːt tʰaj ] ) , officially the Kingdom of Thailand ( [ : wikt : ราชอาณาจักรไทย , ราชอาณาจักรไทย ] , [ râːt.t͡ɕʰa.ʔaː.naː.t͡ɕàk tʰaj ] ) , formerly known as Siam ( [ : wikt : สยาม , สยาม ] , [ sa.jǎːm ] ) , is a country at the centre of the Indochinese peninsula in Southeast Asia . Thailand is a constitutional monarchy and has switched between parliamentary democracy and military junta for decades , the latest coup being in May 2014 by the National Council for Peace and Order .