Voter Demographics

Who can vote in 2027, by generation and age band: 2019 census age structure projected to election day, joined with the IEBC 2022 register.

Scope

Population (2019)

875,661

Registered voters (2022)

376,985

Voting-age by Aug 2027 (est.)

642,225

Gen-z eligible 2027 (est.)

290,072

45.2% of the 2027 voting-age est.

Gen-z (born 1997-2012)

290,072 eligible

≈ 170,272 of today's registered voters, if registration mirrors the age structure.

Youth (18-34 in 2027)

348,943

The bloc every 2027 campaign is chasing.

Millennials (born 1981-1996)

192,779

Peak-turnout generation in Bomet.

Age structure · Bomet

2019 census population by five-year band.

0-4

110,976

5-9

122,460

10-14

131,348

15-19

110,009

20-24

81,192

25-29

65,986

30-34

63,087

35-39

39,036

40-44

36,211

45-49

32,341

50-54

18,818

55-59

18,251

60-64

14,126

65-69

10,667

70-74

8,505

75-79

4,816

80-84

3,527

85-89

2,298

90-94

1,120

95-99

607

100+

280

Voters by constituency and ward · Bomet

County age share (45.2%) applied to each seat's 2022 registered voters, an estimate, since sub-county age data isn't published.

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Estimated 2027 voting-age population by ward (county age share × 2022 register). Darker = more voting-age residents.

Methodology & sources

Age structure: KNBS 2019 Census (via OCHA COD-PS, data.humdata.org/dataset/cod-ps-ken), from the 2019 census county tables (KNBS via OCHA).
Registered voters: IEBC 2022 General Election register (per ward), the same figures behind every seat page here.
2027 projections age the census cohorts forward to August 2027 (whoever was N years old in 2019 is N+8), ignoring mortality and migration; treat them as estimates.
Gen-z = born 1997-2012; those born by August 2009 are eligible in 2027. Constituency and ward figures apply the county's age share to the seat's registered voters.
These are eligibility and registration figures, never turnout predictions.