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)

885,687

Registered voters (2022)

406,288

Voting-age by Aug 2027 (est.)

663,583

Gen-z eligible 2027 (est.)

283,121

42.7% of the 2027 voting-age est.

Gen-z (born 1997-2012)

283,121 eligible

≈ 173,345 of today's registered voters, if registration mirrors the age structure.

Youth (18-34 in 2027)

341,435

The bloc every 2027 campaign is chasing.

Millennials (born 1981-1996)

198,704

Peak-turnout generation in Nandi.

Age structure · Nandi

2019 census population by five-year band.

0-4

105,970

5-9

116,134

10-14

126,113

15-19

108,741

20-24

80,445

25-29

65,340

30-34

65,107

35-39

45,099

40-44

40,890

45-49

34,611

50-54

23,805

55-59

21,436

60-64

16,048

65-69

12,636

70-74

9,039

75-79

5,989

80-84

3,646

85-89

2,365

90-94

1,148

95-99

808

100+

317

Voters by constituency and ward · Nandi

County age share (42.7%) 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.