The death of PAP Assembly Member Baharuddin Mohammed Ariff precipitated this by-election. The victory of former LF Chief Minister David Marshall, now WP chief, symbolised WP's first presence in the legislature. In the meantime, independent AM Ong Eng Guan mustered his two former PAP colleagues who resigned with him to form UPP. After this, PAP expelled the 13 AMs of Bras Basah, Queenstown, Chua Chu Kang, Havelock, Jalan Kayu, Moulmein, Nee Soon, Pasir Panjang, Serangoon Gardens, Stamford, Thomson, Toa Payoh and Upper Serangoon for breaking ranks and pulling support away to the opponent.

Nomination day: 10 June 1961 [Sat]
Polling day: 15 July 1961 [Sat]

Total voters: 9,816
Total voter turnout: 9,566 (97.5%)

Election deposit: $500

RESULTS

Anson

Total seats = 1