Lumadan is a state constituency in Sabah, Malaysia, that is represented in the Sabah State Legislative Assembly.[1] 
  Demographics
   Ethnic breakdown of Lumadan's electorate as of 2020
  - Sabah Bumiputera (85.3%)
- Malay-Muslim Bumiputera (8.66%)
- Chinese (3.54%)
- Other ethnicities (2.51%)
 History
 Polling districts
 According to the gazette issued on 31 October 2022, the Lumadan constituency has a total of 13 polling districts.[2] 
   | State constituency | Polling District | Code | Location | 
  | Lumadan (N34) | Kabajang | 178/34/01 | SK Kabajang | 
  | Gadong | 178/34/02 |  | 
  | Lupak | 178/34/03 | SK Lupak | 
  | Padas Valley | 178/34/04 | SK Luagan | 
  | Beaufort Selatan | 178/34/05 | SK Pekan BeaufortKolej Vokesional Beaufort
 | 
  | Lumadan | 178/34/06 | SK Ladang-Lumadan | 
  | Bukau | 178/34/07 | SK Bukau | 
  | Suasa | 178/34/08 | SK Suasa | 
  | Padas Demit | 178/34/09 | SK Padas Demit | 
  | Bankalalak | 178/34/10 | SK Bangkalalak | 
  | Weston | 178/34/11 |  | 
  | Lubok | 178/34/12 | SK Lubok | 
  | Lingkungan | 178/34/13 |  | 
 Representation History
   | Member of Sabah State Legislative Assembly for Lumadan | 
  | Assembly | Years | Member | Party | 
  | Constituency created from Beaufort | 
  | 5th | 1976 | Mohamed Dun Banir | BERJAYA | 
  | 1976 – 1981 | BN (BERJAYA) | 
  | 6th | 1981 | 
  | 1981 – 1985 | Johari Mohamed Dun | 
  | 7th | 1985 – 1986 | Dayang Mahani Pengiran Ahmad Raffae | USNO | 
  | 8th | 1986 – 1990 | 
  | 9th | 1990 – 1994 | 
  | 10th | 1994 – 1999 | BN (USNO) | 
  | 11th | 1999 – 2004 | Sarinum Sadikun | BN (UMNO) | 
  | 12th | 2004 – 2008 | 
  | 13th | 2008 – 2013 | Kamarlin Ombi | 
  | 14th | 2013 – 2018 | 
  | 15th | 2018 | Matbali Musah | 
  | 2018 – 2019 | Independent | 
  | 2019 – 2020 | PH (BERSATU) | 
  | 2020 | PN (BERSATU) | 
  | 16th | 2020 – present | Ruslan Muharam | GRS (PBS) | 
 Election results
     Sabah state election, 2018: Lumadan    | Party | Candidate | Votes | % | ∆% | 
  |  | BN | Matbali Musah | 6,836 | 55.04 |  1.24 | 
  |  | Sabah Heritage Party | Mohd Samlih Juaisin | 3,901 | 31.41 |  31.41 | 
  |  | Pakatan HarapanRS | Asmat Japar | 1,331 | 10.72 |  10.72 | 
  | Total valid votes | 12,068 | 97.17 | 
  | Total rejected ballots | 286 | 2.30 | 
  | Unreturned ballots | 66 | 0.53 | 
  | Turnout | 12,420 | 84.93 |  0.57 | 
  | Registered electors | 15,009 | 
  | Majority | 2,935 | 23.63 |  9.15 | 
  |  | hold | Swing | BN | 
  |  | 
   Sabah state election, 2013: Lumadan    | Party | Candidate | Votes | % | ∆% | 
  |  | BN | Kamarlin Ombi | 6,338 | 53.80 |  13.30 | 
  |  | Independent | Rapahi Edris | 2,476 | 21.02 |  21.02 | 
  |  | PKR | Abdul Rahman Mohd Yakub | 2,303 | 19.55 |  8.79 | 
  |  | STAR | Mohd Jaafar Ibrahim | 147 | 1.25 |  1.25 | 
  |  | SAPP | Jamain Sarudin | 143 | 1.21 |  1.21 | 
  |  | Independent | Saudi Suhaili | 69 | 0.59 |  0.59 | 
  | Total valid votes | 11,476 | 97.42 | 
  | Total rejected ballots | 246 | 2.09 | 
  | Unreturned ballots | 58 | 0.49 | 
  | Turnout | 11,780 | 85.50 |  10.35 | 
  | Registered electors | 13,777 | 
  | Majority | 3,862 | 32.78 |  5.98 | 
  |  | hold | Swing | BN | 
  |  | 
   Sabah state election, 2008: Lumadan    | Party | Candidate | Votes | % | ∆% | 
  |  | BN | Kamarlin Ombi | 5,707 | 67.10 |  11.49 | 
  |  | PKR | Dojit Muda | 2,410 | 28.34 |  28.34 | 
  |  | Independent | Brahim Awang Anak | 107 | 1.26 |  1.26 | 
  | Total valid votes | 8,224 | 96.70 | 
  | Total rejected ballots | 276 | 3.25 | 
  | Unreturned ballots | 5 | 0.06 | 
  | Turnout | 8,505 | 75.15 |  4.62 | 
  | Registered electors | 11,317 | 
  | Majority | 3,297 | 38.76 |  25.75 | 
  |  | hold | Swing | BN | 
  |  | 
   Sabah state election, 2004: Lumadan    | Party | Candidate | Votes | % | ∆% | 
  |  | BN | Sarinum Sadikun | 4,269 | 55.61 |  0.85 | 
  |  | SETIA | Dojit Muda | 3,270 | 42.60 |  38.83 | 
  | Total valid votes | 7,539 | 98.22 | 
  | Total rejected ballots | 137 | 1.78 | 
  | Unreturned ballots | 0 | 0.00 | 
  | Turnout | 7,676 | 70.53 |  7.28 | 
  | Registered electors | 10,883 | 
  | Majority | 999 | 13.01 |  15.50 | 
  |  | hold | Swing | BN | 
  |  | 
   Sabah state election, 1999: Lumadan    | Party | Candidate | Votes | % | ∆% | 
  |  | BN | Sarinum Sadikun | 4,678 | 56.46 |  4.88 | 
  |  | PBS | Yusof Judin | 2,316 | 27.95 |  9.38 | 
  |  | PKR | Abdul Sulaiman Omar | 847 | 10.22 |  10.22 | 
  |  | SETIA | Jahari @ Johari Mohd Dun | 312 | 3.77 |  3.77 | 
  | Total valid votes | 8,153 | 98.41 | 
  | Total rejected ballots | 132 | 1.59 | 
  | Unreturned ballots | 0 | 0.00 | 
  | Turnout | 8,285 | 77.81 |  3.43 | 
  | Registered electors | 10,648 | 
  | Majority | 2,362 | 28.51 |  4.50 | 
  |  | hold | Swing | BN | 
  |  | 
   Sabah state election, 1994: Lumadan    | Party | Candidate | Votes | % | ∆% | 
  |  | BN | Dayang Mahani Pengiran Ahmad Raffae | 4,517 | 61.34 |  14.42 | 
  |  | PBS | Sadi @ Sadih Nasah | 2,749 | 37.33 |  5.05 | 
  | Total valid votes | 7,266 | 98.67 | 
  | Total rejected ballots | 98 | 1.33 | 
  | Unreturned ballots | 0 | 0.00 | 
  | Turnout | 7,364 | 81.24 |  2.67 | 
  | Registered electors | 9,065 | 
  | Majority | 1,768 | 24.01 |  9.37 | 
  |  | gain from BN | Swing | USNO | 
  |  | 
   Sabah state election, 1990: Lumadan    | Party | Candidate | Votes | % | ∆% | 
  |  | USNO | Dayang Mahani Pengiran Ahmad Raffae | 2,916 | 46.92 |  20.89 | 
  |  | PBS | Moktani Lawi | 2,006 | 32.28 |  1.63 | 
  |  | BERJAYA | Edin Ansim | 1,083 | 17.43 |  17.43 | 
  |  | PRS | Mathew Badong | 92 | 1.48 |  1.48 | 
  | Total valid votes | 6,097 | 98.10 | 
  | Total rejected ballots | 118 | 1.90 | 
  | Unreturned ballots | 0 | 0.00 | 
  | Turnout | 6,215 | 78.57 |  5.41 | 
  | Registered electors | 7,910 | 
  | Majority | 910 | 14.64 |  22.52 | 
  |  | hold | Swing | USNO | 
  |  | 
   Sabah state election, 1986: Lumadan    | Party | Candidate | Votes | % | ∆% | 
  |  | USNO | Dayang Mahani Pengiran Ahmad Raffae | 3,737 | 67.81 |  | 
  |  | PBS | Rashid Gador @ Abdul Rashid Gador | 1,689 | 30.65 |  | 
  | Total valid votes | 5,426 | 98.46 | 
  | Total rejected ballots | 85 | 1.54 | 
  | Unreturned ballots | 0 | 0.00 | 
  | Turnout | 5,511 | 73.16 | 
  | Registered electors | 7,533 | 
  | Majority | 2,048 | 37.16 | 
  |  | hold | Swing | USNO | 
  |  | 
 References
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| | Perlis State Legislative Assembly | 
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| | Kedah State Legislative Assembly | 
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| | Kelantan State Legislative Assembly | 
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| | Terengganu State Legislative Assembly | 
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| | Penang State Legislative Assembly | 
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| | Perak State Legislative Assembly | 
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| | Pahang State Legislative Assembly | 
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| | Selangor State Legislative Assembly | 
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| | Negeri Sembilan State Legislative Assembly | 
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| | Malacca State Legislative Assembly | 
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| | Johor State Legislative Assembly | 
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| | Sabah State Legislative Assembly | 
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| | Sarawak State Legislative Assembly | 
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