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)

605,559

Registered voters (2022)

323,283

Voting-age by Aug 2027 (est.)

462,348

Gen-z eligible 2027 (est.)

190,470

41.2% of the 2027 voting-age est.

Gen-z (born 1997-2012)

190,470 eligible

≈ 133,180 of today's registered voters, if registration mirrors the age structure.

Youth (18-34 in 2027)

224,871

The bloc every 2027 campaign is chasing.

Millennials (born 1981-1996)

129,586

Peak-turnout generation in Nyamira.

Age structure · Nyamira

2019 census population by five-year band.

0-4

64,454

5-9

78,757

10-14

93,493

15-19

70,393

20-24

44,306

25-29

41,698

30-34

45,546

35-39

30,775

40-44

28,903

45-49

24,653

50-54

16,087

55-59

20,128

60-64

16,011

65-69

10,869

70-74

8,654

75-79

4,264

80-84

3,288

85-89

1,898

90-94

787

95-99

413

100+

182

Voters by constituency and ward · Nyamira

County age share (41.2%) 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.