This by-election was called to renew the PAP's ranks by inviting five of its Members of Parliament to resign and give way to new blood. With WP licking its "wounds" after a disastrous showing in the 1968 GE, only UNF - a new party with remnants from the defunct SA - sent some candidates but PAP once again won all the seats for grabs.

Nomination day: 8 April 1970 [Wed]
Polling day: 18 April 1970 [Sat]

Eligible voters: 69,125
Voters in walkover constituencies: 43,815 (63.4%)
Total voters: 25,310 (36.6%)
Total voter turnout: 21,550 (85.1%)

Election deposit: $500

RESULTS
Delta	Havelock	Kampong Kapor	Ulu Pandan	Whampoa
Total seats = 5