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)

759,123

Registered voters (2022)

481,632

Voting-age by Aug 2027 (est.)

610,946

Gen-z eligible 2027 (est.)

185,550

30.4% of the 2027 voting-age est.

Gen-z (born 1997-2012)

185,550 eligible

≈ 146,276 of today's registered voters, if registration mirrors the age structure.

Youth (18-34 in 2027)

228,937

The bloc every 2027 campaign is chasing.

Millennials (born 1981-1996)

170,057

Peak-turnout generation in Nyeri.

Age structure · Nyeri

2019 census population by five-year band.

0-4

73,098

5-9

75,079

10-14

76,522

15-19

73,527

20-24

59,169

25-29

49,297

30-34

54,585

35-39

53,134

40-44

48,038

45-49

43,568

50-54

38,668

55-59

32,478

60-64

21,518

65-69

18,168

70-74

17,194

75-79

10,438

80-84

7,109

85-89

3,882

90-94

2,093

95-99

1,067

100+

491

Voters by constituency and ward · Nyeri

County age share (30.4%) 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.