10 Counties Expected to Have the Highest Number of Voters in 2027

As Kenya prepares for the upcoming 2027 General Election, leaders across the country are encouraging citizens to register as voters early.

Many politicians and aspiring candidates are asking their supporters to ensure they have valid voter cards. One popular campaign pushing this message is the “Niko Kadi” initiative, which has become widely known both online and in communities.

Top leaders, including William Ruto and Rigathi Gachagua, have already supported the campaign to motivate more Kenyans, especially young people, to register.

Counties Expected to Lead in Voter Numbers

With voter registration expected to increase, some counties are likely to record the highest number of voters in the 2027 election.

Nairobi is projected to lead with about 3 million voters, making it the top voting region in the country. The capital city is known for its diverse population, bringing together people from different backgrounds.

Kiambu County is expected to follow with around 2 million voters.

Other counties likely to have large voter numbers, each projected to reach close to 1 million voters, include:

• • Nakuru County
  • Kakamega County
  • Meru County
  • Machakos County
  • Bungoma County
  • Mombasa County
  • Kisii County
  • Murang’a County
  • Kisumu County

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Top counties by projected voters by 2027:

Nairobi City – 3 million
Kiambu County – 2 million
Nakuru County – 1 million
Kakamega County – 1 million
Meru County – 1 million
Machakos County – 1 million
Bungoma County – 1 million
Mombasa County – 1 million
Kisii County – 1 million…

— Moe (@moneyacademyKE) April 5, 2026

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Previous Election Data

During the last election in 2022, Nairobi had over 2.4 million registered voters, followed by Kiambu County with more than 1.2 million voters.

Other counties such as Nakuru County, Kakamega County, and Meru County also recorded high numbers.

In total, Kenya had over 22 million registered voters in the previous General Election.

What This Means for 2027

With ongoing voter registration campaigns, the number of voters is expected to grow even higher before 2027.

Counties with large populations will continue to play a major role in deciding election outcomes. Political leaders are therefore focusing more on these regions as they prepare for the next General Electio