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)

610,371

Registered voters (2022)

376,001

Voting-age by Aug 2027 (est.)

495,595

Gen-z eligible 2027 (est.)

147,042

29.7% of the 2027 voting-age est.

Gen-z (born 1997-2012)

147,042 eligible

≈ 111,559 of today's registered voters, if registration mirrors the age structure.

Youth (18-34 in 2027)

182,555

The bloc every 2027 campaign is chasing.

Millennials (born 1981-1996)

149,929

Peak-turnout generation in Kirinyaga.

Age structure · Kirinyaga

2019 census population by five-year band.

0-4

57,491

5-9

57,285

10-14

60,996

15-19

58,069

20-24

46,628

25-29

42,154

30-34

49,748

35-39

49,220

40-44

42,775

45-49

35,967

50-54

29,512

55-59

24,981

60-64

15,874

65-69

13,427

70-74

10,684

75-79

5,464

80-84

4,439

85-89

2,526

90-94

1,682

95-99

844

100+

605

Voters by constituency and ward · Kirinyaga

County age share (29.7%) 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.