This article discusses the impact of plurality on Malaysia-Singapore relations after the formation of
Malaysia on September 16, 1963. The establishment of the Federation of Malaysia agreement was
signed in London on July 8, 1963 by the representatives of the British government, the Federation of
Malaya, Singapore, Sabah and Sarawak. All parties agreed to the change in name from Federation of
Malaya to Malaysia. The declaration of Malaysia was made on September 16, 1963 simultaneously
throughout the country. This study uses secondary sources and library research methods. The findings
show that Singapore's existence in Malaysia was seen to have raised racial issues leading to the
separation of Singapore from Malaysia on August 9, 1965. Ethnic-related problems need to be
addressed wisely in order to not be a threat to racial relations among the plural society in Malaysia.