| Honorific-Prefix: | Yang Berbahagia Datuk |
| William Nyallau Badak | |
| Birth Date: | 22 July 1951 |
| Birth Place: | Crown Colony of Sarawak (now Sarawak, Malaysia) |
| Parliament: | Malaysian |
| Term Start: | 8 March 2008 |
| Term End: | 9 May 2018 |
| Predecessor: | Jawah Gerang (BN–PRS) |
| Successor: | Jugah Muyang (IND) |
| Majority: | 1,610 (2008) 4,091 (2013) |
| Citizenship: | Malaysian |
| Party: | Parti Rakyat Sarawak (PRS) Parti Sarawak Bersatu (PSB) Independent |
| Otherparty: | Barisan Nasional (BN) Gabungan Parti Sarawak (GPS) |
| Occupation: | Politician |
William Nyallau Badak (born 22 July 1951) is a Malaysian politician who served as the Member of Parliament (MP) for Lubok Antu from March 2008 to May 2018. He is an independent in support for the ruling Gabungan Parti Sarawak (GPS) coalition and was a member of the opposition Parti Sarawak Bersatu (PSB) and of the Parti Rakyat Sarawak (PRS), a component party of the ruling Barisan Nasional (BN) coalition.[1] He was elected to Parliament in the 2008 election, replacing long-serving incumbent Jawah Gerang.[2] Before entering Parliament, he was a Native Court judge.[3] He joined PSB in 2019 after he was sacked from PRS on 22 April 2018 and dropped as a candidate in the 2018 general election. In 2021 Sarawak state election, he contested for the Batang Ai state seat as a PSB candidate but lost. On 8 November 2022, he left PSB and pledged his support for GPS.[4]
| Constituency | Candidate | Votes | Pct | Opponent(s) | Votes | Pct | Ballots cast | Majority | Turnout | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2004 | P203 Lubok Antu, Sarawak | William Nyallau Badak (IND) | 4,927 | 41.44% | (PRS) | 6,962 | 58.56% | 12,139 | 2,035 | 68.79% | ||||
| 2008 | (PRS) | 6,769 | 56.75% | Nicholas Bawin Anggat (IND) | 5,159 | 43.25% | 12,038 | 1,610 | 70.03% | |||||
| 2013 | (PRS) | 8,278 | 55.21% | bgcolor= | Larry Soon @ Larry Sng Wei Shien (SWP) | 4,187 | 27.92% | 15,166 | 4,091 | 78.57% | ||||
| Nicholas Bawin Anggat (PKR) | 2,530 | 16.87% | ||||||||||||
| Constituency | Candidate | Votes | Pct | Opponent(s) | Votes | Pct | Valid votes | Majority | Turnout | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | William Nyallau Badak (PSB) | 1,366 | 18.99% | (PRS) | 3,208 | 44.59% | 7,195 | 738 | 72.99% | |||
| John Linang Mereejon (IND) | 2,470 | 34.33% | ||||||||||
| Usup Asun (PBK) | 151 | 2.10% | ||||||||||
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