County profile
Siaya County
People. Elections. Representation. Public money.
People & places
Largest first; equal values share a rank. County registers exclude diaspora. Select a measure for its source. The 2022 population is KNBS's projection for that year, carried forward from the 2019 census — an estimate, not a count. 993,183 residents were counted here in 2019.
County outline. Constituency boundary polygons are not held; the list opens each constituency.
Registering for 2027
Across the whole country 2,936,516 people had newly registered as voters as at Aug. 20, 2026. It already includes the county figure above and is never added to it. Continuous voter registration has run since Sept. 29, 2025.
There is no 2027 register yet — IEBC de-duplicates, audits and gazettes one first — so these cannot simply be added to the 2022 figure above.
Dates, scope & source
Enhanced Continuous Voter Registration, Phase 1, run from March 30, 2026 to April 28, 2026. Figures are IEBC's own, stated as of April 28, 2026.
Newly registered voters only. IEBC prints transfers of registration (2,210) and changes of particulars (30) in the same table; neither is a new voter and neither is added here.
The figure is IEBC's; describing it as new registrations rather than the register is ours, and the release's own sentence states no scope and no window.
Registered voters · 2017 to 2027
Between the registers held · 2017–2022
How this is worked out
Both figures compare the same county in the two registers we hold. Percentage change = (2022 count − 2017 count) ÷ 2017 count × 100. Ranks cover only counties with a register in both years. These are registrations, not votes cast.
Bars are scaled against the largest register this county itself holds, and start at zero. A year with no register held shows no bar rather than a zero.
Age profile & sources
People & the register · Siaya
Years, scope & sources
² KNBS Volume XVI, Appendix 5: the population KNBS projects for 2022, carried forward from the 2019 census. It is an estimate of how many people live here, not a count of people enumerated. 993,183 residents were actually counted in 2019 — KNBS Volume I, Table 2.4, all persons.
The adult figure stays on 2019 because no projected one exists: Volume XVI prints five-year age bands, so 18 falls inside 15–19 and no voting-age figure is published at county level for any year. Splitting that band here would be inventing a number KNBS has not published.
¹ KNBS Volume III, Table 2.3: population distributed by age and sex; excludes the intersex population, so it sums lower than the headcount above. The adult count is aged 18+ on census night in 2019 — Volume I prints no age breakdown, so the adults figure can only come from this table. The register counts registrations in 2022, not ballots cast.
76,863 residents were aged 15–17 in 2019. Ageing, migration and the different dates can affect this comparison. This is not a registration rate. KNBS sub-counties are not constituencies; this comparison applies at county level.
Representatives
Who speaks for Siaya in Parliament.
2022 election — who won here
Declared winners from the IEBC Kenya Gazette.
County-wide winners · 2022
GovernorOrengo James Aggrey BobODM · 220,349 votesGazette 9949
SenatorOginga Oburu (Dr.)ODM · 285,595 votesGazette 9955
Woman RepresentativeOduor Christine OmbakaODM · 207,748 votesGazette 9951
Constituencies & registered voters
Constituency winners · 2022
Alego UsongaAtandi Samuel OnungaODM · 69,129 votesGazette 9950
BondoOgolla Gideon OchandaODM · 69,574 votesGazette 9950
GemOdhiambo Elisha OchiengODM · 48,456 votesGazette 9950
RariedaAmollo Paul OtiendeODM · 37,676 votesGazette 9950
UgenyaOchieng David OumaMDG · 25,520 votesGazette 9950
UgunjaWandayi James OpiyoODM · 32,359 votesGazette 9950
County Assembly (MCA) winners — 30 wards
- South East Alego Madowo · Scholastica Masidis Orange Democratic 17,164 ODM
- North Sakwa · Arika Oliver Otieno 14,002 ODM
- Ugunja · Otieno Edwin Martin 13,124 ODM
- Central Alego · Ragen David Omondi 11,587 ODM
- Siaya Township · Otare James Obiero 10,780 ODM
Show the other 24 of 29, same scale
- North Woma · Bonyo Washington Booker 9,379 ODM
- West Sakwa · Odinga Truphosa Apondi Osewe 8,557 ODM
- Sidindi · Apodo John Otieno 8,252 ODM
- West Woma · Obuya Justus Oguta 8,144 ODM
- West Alego · Okumu Felix Ouma 7,934 ODM
- Central Gem · Anyango Sylas Madingu 7,337 ODM
- North Ugenya · Adala Benard Onyango 7,140 ODM
- Sigomere · Omolo Andrew Omwende Orange Democratic Movement 7,094 ODM
- North Gem · Abuba Philip Obonyo Oluoch 6,990 FPK
- Yala Township · Onyango William Kinyanyi 6,824 ODM
- East Ugenya · Omoro Fredrick Oluoch 6,561 ODM
- South Sakwa · Achieng Eunice Rahel 6,554 ODM
- North Alego · Odawa Vincent Otieno 6,188 ODM
- West Ugenya · Odongo Andericus Oduor 6,096 ODM
- Yimbo East · Otieno Francis Otiato 5,985 ODM
- Central Sakwa · Otieno Joseph Bismark Olang’o 5,848 ODM
- Ukwala · Omondi Joseph Peter 5,737 ODM
- East Asembo · Onguuru Gordon Onyango 5,722 UDM
- West Asembo · Okeyo Mark Okeyo 5,598 ODM
- West Yimbo · Angule Simon Otieno 5,552 IND
- West Gem · Okwirry Achieng Susan 5,513 ODM
- South Woma · Otieno Michael Omondi 5,225 ODM
- East Gem · Ochieng Seth Baraka 4,107 ODM
- Usonga · Madialo Sylvester Otieno 3,942 ODM
Show all 30 wards as a table
| Ward | Constituency | Winner | Party | Votes |
|---|---|---|---|---|
| Central Alego | Alego Usonga | Ragen David Omondi | ODM | 11,587 |
| North Alego | Alego Usonga | Odawa Vincent Otieno | ODM | 6,188 |
| Siaya Township | Alego Usonga | Otare James Obiero | ODM | 10,780 |
| South East Alego Madowo | Alego Usonga | Scholastica Masidis Orange Democratic | ODM | 17,164 |
| Usonga | Alego Usonga | Madialo Sylvester Otieno | ODM | 3,942 |
| West Alego | Alego Usonga | Okumu Felix Ouma | ODM | 7,934 |
| Central Sakwa | Bondo | Otieno Joseph Bismark Olang’o | ODM | 5,848 |
| North Sakwa | Bondo | Arika Oliver Otieno | ODM | 14,002 |
| South Sakwa | Bondo | Achieng Eunice Rahel | ODM | 6,554 |
| West Sakwa | Bondo | Odinga Truphosa Apondi Osewe | ODM | 8,557 |
| West Yimbo | Bondo | Angule Simon Otieno | IND | 5,552 |
| Yimbo East | Bondo | Otieno Francis Otiato | ODM | 5,985 |
| Central Gem | Gem | Anyango Sylas Madingu | ODM | 7,337 |
| East Gem | Gem | Ochieng Seth Baraka | ODM | 4,107 |
| North Gem | Gem | Abuba Philip Obonyo Oluoch | FPK | 6,990 |
| South Gem | Gem | - - | Not stated | — |
| West Gem | Gem | Okwirry Achieng Susan | ODM | 5,513 |
| Yala Township | Gem | Onyango William Kinyanyi | ODM | 6,824 |
| East Asembo | Rarieda | Onguuru Gordon Onyango | UDM | 5,722 |
| North Woma | Rarieda | Bonyo Washington Booker | ODM | 9,379 |
| South Woma | Rarieda | Otieno Michael Omondi | ODM | 5,225 |
| West Asembo | Rarieda | Okeyo Mark Okeyo | ODM | 5,598 |
| West Woma | Rarieda | Obuya Justus Oguta | ODM | 8,144 |
| East Ugenya | Ugenya | Omoro Fredrick Oluoch | ODM | 6,561 |
| North Ugenya | Ugenya | Adala Benard Onyango | ODM | 7,140 |
| Ukwala | Ugenya | Omondi Joseph Peter | ODM | 5,737 |
| West Ugenya | Ugenya | Odongo Andericus Oduor | ODM | 6,096 |
| Sidindi | Ugunja | Apodo John Otieno | ODM | 8,252 |
| Sigomere | Ugunja | Omolo Andrew Omwende Orange Democratic Movement | ODM | 7,094 |
| Ugunja | Ugunja | Otieno Edwin Martin | ODM | 13,124 |
Source: IEBC · Kenya Gazette · Gazette 9956 · declared winners only, not per-candidate tallies.
Parliamentary activity
What Siaya's members do across both Houses.
Hansard contributions in the current Parliament. Speech made while chairing a sitting is never counted, and each representative's own count is shown on their card above. Browse the full National Assembly and Senate.
Totals across both Houses for the county's current members, for the selected period, using the same counting policy as the member profiles.
Topics raised by members
Three leading topics per member · current parliamentary term · automated labels, not official categories. Topics may overlap.
Counts are contributions tagged with a topic, not a measure of work done within this county.
Siaya County government budget
What the county government itself budgeted and spent, as reported by the Controller of Budget — separate from the NG-CDF money below.
Controller of Budget, Annual FY 2025/26 — the report.
NG-CDF in Siaya County
National-government development money allocated per constituency — not the county government's budget.
- Alego Usonga KSh 202,243,910
- Bondo KSh 202,243,910
- Gem KSh 202,243,910
- Rarieda KSh 192,613,248
- Ugenya KSh 182,982,585
Show the other 1 of 6, same scale
- Ugunja KSh 173,351,923
Allocations by constituency and financial year
| Constituency | FY 2025/26 | FY 2024/25 | FY 2023/24 | FY 2022/23 |
|---|---|---|---|---|
| Alego Usonga NG-CDF record → | KSh 202,243,910 | KSh 188,414,052 | KSh 184,129,901 | KSh 151,960,174 |
| Bondo NG-CDF record → | KSh 202,243,910 | — | KSh 184,129,901 | KSh 151,960,174 |
| Gem NG-CDF record → | KSh 202,243,910 | KSh 188,414,052 | KSh 184,129,901 | KSh 151,960,174 |
| Rarieda NG-CDF record → | KSh 192,613,248 | KSh 179,441,954 | — | KSh 145,087,603 |
| Ugenya NG-CDF record → | KSh 182,982,585 | KSh 170,469,857 | KSh 166,593,720 | — |
| Ugunja NG-CDF record → | KSh 173,351,923 | KSh 161,497,759 | KSh 157,825,629 | KSh 131,342,462 |
Source: NG-CDF Board, checked against their own record before publication.
How this compares
KSh 1.16B 22nd of 47
Ahead of 43% · median KSh 1.16B
533,595 14th of 47
Ahead of 70% · median 398,981
1,010 20th of 47
Ahead of 57% · median 916
11 25th of 47
Ahead of 43% · median 12
17 20th of 47
Ahead of 55% · median 16
19 47th of 47
Ahead of 0% · median 73
1 25th of 47
Ahead of 23% · median 2
20 35th of 47
Ahead of 26% · median 42
What these numbers don’t measure
- Committee work
- Parliament publishes no committee attendance for either House, so nobody can count it — us included.
- Constituency work
- Funerals, harambees, schools, casework. Recorded nowhere we can read.
- Whether it worked
- We can count questions asked, not answers given.
- Speaking often isn’t speaking well. Use these to ask your representative better questions — not to grade them.
Sources & coverage
Years, geographic scope and original records.
- KNBS census · 2019 — county age/sex population, as enumerated.
- KNBS projections · Volume XVI — the population projected for 2022 from the 2019 census. An estimate, not a count.
- IEBC register · 2022 — registrations, not votes cast.
- IEBC declarations · 2022 — each winner links to the Gazette in Elections.
- Parliament — current members' records and Hansard. Topic labels are automated analysis, not Parliament's own categories.
- Controller of Budget · 2025/26 — Annual FY 2025/26.
- NG-CDF project records use each constituency's register. These and its allocations are separate from county-government spending. View records.