1979 Singaporean by-elections

The by-election was held on 10 February 1979 while the nomination day was held on 31 January 1979. For the Anson Single Member Constituency (SMC), People's Action Party (PAP) candidate Devan Nair defeated Democratic Progressive Party (DPP) candidate Johnny Wee Lai Deng with 86.2% of valid votes. Devan Nair was declared to be the MP for Anson SMC. For the Mountbatten SMC, People's Action Party (PAP) candidate Eugene Yap Giau Cheng defeated Democratic Progressive Party (DPP) candidate Seow Khee Leng with 79.9% of valid votes. Eugene Yap Giau Cheng was declared to be the MP for Mountbatten SMC.

1979 Singaporean by-elections

The by-election was held on 10 February 1979 while the nomination day was held on 31 January 1979. For the Anson Single Member Constituency (SMC), People's Action Party (PAP) candidate Devan Nair defeated Democratic Progressive Party (DPP) candidate Johnny Wee Lai Deng with 86.2% of valid votes. Devan Nair was declared to be the MP for Anson SMC. For the Mountbatten SMC, People's Action Party (PAP) candidate Eugene Yap Giau Cheng defeated Democratic Progressive Party (DPP) candidate Seow Khee Leng with 79.9% of valid votes. Eugene Yap Giau Cheng was declared to be the MP for Mountbatten SMC.