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)

1,155,524

Registered voters (2022)

606,754

Voting-age by Aug 2027 (est.)

866,789

Gen-z eligible 2027 (est.)

367,251

42.4% of the 2027 voting-age est.

Gen-z (born 1997-2012)

367,251 eligible

≈ 257,076 of today's registered voters, if registration mirrors the age structure.

Youth (18-34 in 2027)

451,181

The bloc every 2027 campaign is chasing.

Millennials (born 1981-1996)

282,526

Peak-turnout generation in Kisumu.

Age structure · Kisumu

2019 census population by five-year band.

0-4

141,070

5-9

147,665

10-14

164,523

15-19

134,904

20-24

113,040

25-29

96,786

30-34

90,298

35-39

62,783

40-44

51,143

45-49

34,414

50-54

27,481

55-59

25,132

60-64

21,696

65-69

16,567

70-74

12,768

75-79

6,651

80-84

4,732

85-89

2,490

90-94

876

95-99

369

100+

136

Voters by constituency and ward · Kisumu

County age share (42.4%) 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.