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)

267,992

Registered voters (2022)

89,504

Voting-age by Aug 2027 (est.)

186,230

Gen-z eligible 2027 (est.)

84,902

45.6% of the 2027 voting-age est.

Gen-z (born 1997-2012)

84,902 eligible

≈ 40,805 of today's registered voters, if registration mirrors the age structure.

Youth (18-34 in 2027)

102,981

The bloc every 2027 campaign is chasing.

Millennials (born 1981-1996)

59,065

Peak-turnout generation in Isiolo.

Age structure · Isiolo

2019 census population by five-year band.

0-4

40,617

5-9

41,145

10-14

38,914

15-19

31,154

20-24

24,723

25-29

20,476

30-34

18,550

35-39

12,687

40-44

9,781

45-49

7,123

50-54

5,478

55-59

4,830

60-64

4,401

65-69

2,611

70-74

2,422

75-79

1,112

80-84

1,012

85-89

470

90-94

294

95-99

122

100+

Voters by constituency and ward · Isiolo

County age share (45.6%) 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.