The 1967 by-elections were held on 7 March 1967, precipitated following a series of resignations of Barisan Sosialis's MPs which occurred the year before on 5 December 1966.

Six of the vacated seats had by-elections prior, while the other five, Koo Young, Loh Miaw Gong, Ong Lian Teng, Poh Ber Liak and Tan Cheng Tong, resigned on 5 December.

The seats for Bukit Panjang, Havelock, Jalan Kayu, Tampines and Thomson, respectively, were therefore vacant, and polls adjourned on 7 March.

By the end of the following year's election, the last two Barisan MPs Chan Sun Wing (Nee Soon) and Wong Soon Fong (Toa Payoh) had opted to flee the country in order to avoid being arrested[1] by the Internal Security Department (ISD) as what happened to their colleague Chia Thye Poh and others, completing PAP's government monopoly.

The results in the by-election where both independent candidates had their election deposits forfeited proved that PAP would be dominant onto government control and trustworthiness of voting electorate.