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, Ong Eng Guan mustered the two former PAP AMs who resigned with him to form UPP while Assembly Speaker A. P. Rajah joined the newly-formed SA - an alliance of SPA, UMNO, MCA and MIC - and for the first time, there were momentarily no independent legislators.

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