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)

1,421,880

Registered voters (2022)

687,565

Voting-age by Aug 2027 (est.)

1,124,462

Gen-z eligible 2027 (est.)

392,050

34.9% of the 2027 voting-age est.

Gen-z (born 1997-2012)

392,050 eligible

≈ 239,723 of today's registered voters, if registration mirrors the age structure.

Youth (18-34 in 2027)

491,321

The bloc every 2027 campaign is chasing.

Millennials (born 1981-1996)

360,308

Peak-turnout generation in Machakos.

Age structure · Machakos

2019 census population by five-year band.

0-4

146,858

5-9

150,560

10-14

166,215

15-19

147,120

20-24

131,191

25-29

116,987

30-34

114,175

35-39

95,837

40-44

81,711

45-49

64,890

50-54

47,506

55-59

42,586

60-64

36,726

65-69

28,081

70-74

19,972

75-79

11,081

80-84

8,936

85-89

5,066

90-94

3,685

95-99

1,772

100+

925

Voters by constituency and ward · Machakos

County age share (34.9%) 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.