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)

638,264

Registered voters (2022)

361,165

Voting-age by Aug 2027 (est.)

493,373

Gen-z eligible 2027 (est.)

187,519

38.0% of the 2027 voting-age est.

Gen-z (born 1997-2012)

187,519 eligible

≈ 137,270 of today's registered voters, if registration mirrors the age structure.

Youth (18-34 in 2027)

222,474

The bloc every 2027 campaign is chasing.

Millennials (born 1981-1996)

131,721

Peak-turnout generation in Nyandarua.

Age structure · Nyandarua

2019 census population by five-year band.

0-4

69,988

5-9

74,903

10-14

82,873

15-19

75,568

20-24

48,463

25-29

38,926

30-34

42,031

35-39

39,224

40-44

35,094

45-49

32,229

50-54

26,734

55-59

22,256

60-64

14,052

65-69

11,319

70-74

9,678

75-79

6,714

80-84

4,020

85-89

2,269

90-94

1,091

95-99

565

100+

267

Voters by constituency and ward · Nyandarua

County age share (38.0%) 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.