From Kenyatta to Ruto: How Mt. Kenya's Vote Shifted in 2022

Nyeri: 98% to 83%. Kirinyaga: 99% to 85%. Kiambu: 93% to 73%. The Mt. Kenya bloc transferred its allegiance from Kenyatta to Ruto, but the margins shrank by 15-25 percentage points. That erosion could decide 2027.

The Mt. Kenya vote is the single most important variable in Kenyan presidential elections. With over 3 million registered voters across six core counties (Nyeri, Kirinyaga, Murang'a, Kiambu, Nyandarua, and Embu), the Kikuyu and allied communities can deliver margins that no other region can match.

In 2017, when Uhuru Kenyatta was the candidate, these six counties delivered near-unanimous support. The combined Kenyatta vote across the bloc was approximately 2,816,441 votes, with a combined opposition vote of about 106,002. That is a net advantage of roughly 2.7 million votes from just six counties.

In 2022, the transfer to Ruto happened, but imperfectly. The combined Ruto vote across the six counties was approximately 2,020,769, with Odinga getting about 493,437. The net advantage dropped to about 1.53 million, a reduction of roughly 1.17 million votes compared to 2017.

That 1.17-million-vote erosion is five times larger than Ruto's entire 233,211-vote national margin. If the erosion had been any worse, Ruto could have lost.

The Six Counties: 2017 vs 2022

The chart shows each county's drop in the incumbent/ally vote share from 2017 to 2022:

• Kiambu: 92.63% (Kenyatta) to 73.49% (Ruto) = -19.14pp
• Nyandarua: 98.99% to 78.76% = -20.23pp
• Murang'a: 97.87% to 81.68% = -16.19pp
• Nyeri: 98.35% to 83.37% = -14.98pp
• Kirinyaga: 98.61% to 84.70% = -13.91pp
• Embu: 92.10% to 85.04% = -7.06pp

The pattern is clear. The larger, more urbanised counties (Kiambu, Nyandarua) showed bigger drops. The smaller, more rural counties (Embu, Kirinyaga) held firmer. This makes intuitive sense. Urban voters have more diverse information sources, more exposure to opposition messaging, and less dependence on community-level voting cues.

Kiambu's 19-point drop is particularly striking. This is Kenya's second-largest county by registration, with 1,275,168 voters. Kenyatta's home county. The fact that Odinga tripled his vote here from 69,190 to 210,580 demonstrates that even in the most symbolically important Kikuyu county, the bloc was not unanimous.

What Drove the Shift?

Several factors explain why Mt. Kenya's vote transferred from Kenyatta to Ruto, and why the transfer was incomplete:

The ethnic factor: Kenyatta is Kikuyu. Ruto is Kalenjin. In a political system where ethnic identity matters enormously, asking Kikuyu voters to support a non-Kikuyu candidate required a compelling narrative. Rigathi Gachagua's selection as running mate was designed to provide that bridge. It worked, but not as completely as Kenyatta's own candidacy.

The handshake effect: Kenyatta's 2018 reconciliation with Odinga created a permission structure for some Mt. Kenya voters to consider the opposition. Those who followed Kenyatta's implicit endorsement of Odinga showed up as the increased Odinga vote in the region.

Youth disillusionment: Many young Mt. Kenya voters registered between 2017 and 2022 did not carry the same loyalty to the Kenyatta-era Jubilee machinery. Some voted for Ruto, some for Odinga, and some stayed home entirely.

The Opposition's Gains

Odinga's vote in Mt. Kenya grew dramatically between elections. The most striking growth was in Nyandarua, where his vote went from 2,286 to 49,228 (a 2,053% increase). In Kiambu, it tripled from 69,190 to 210,580. Even in Kirinyaga, it went from 3,120 to 37,909 (a 1,115% increase).

These are not just statistical curiosities. They represent hundreds of thousands of Kikuyu voters who made a deliberate decision to cross ethnic lines and vote for an opposition candidate. In a country where ethnic voting patterns are often treated as permanent, this represents meaningful political mobility.

The combined Odinga vote in the six Mt. Kenya counties went from approximately 106,002 in 2017 to 493,437 in 2022, nearly quintupling. If this trend continues, by 2027 the opposition could be competing seriously even in the Mt. Kenya heartland.

The Net Impact on the National Race

The chart shows the net vote advantage (Ruto/Kenyatta minus Odinga) from Mt. Kenya in both elections. In 2017, the net advantage was approximately 2,710,439 votes. In 2022, it dropped to approximately 1,527,332. That is a reduction of 1,183,107 net votes.

Ruto compensated for this erosion by winning votes in other regions. He gained ground in Western Kenya (Bungoma flipped to him), maintained the Rift Valley stronghold, and held enough of the North Eastern and upper Eastern regions. But the Mt. Kenya erosion was the biggest single change in the electoral map between elections.

For the detailed story of individual Mt. Kenya counties, see our spotlights on Nyeri and Kirinyaga, Embu and Nyandarua, Kiambu, and Murang'a.

According to the IEBC, voter registration in the Mt. Kenya bloc grew from roughly 3.2 million in 2017 to 3.5 million in 2022, adding approximately 300,000 new voters. The Kenya Law records of the 2022 Supreme Court petition show that Mt. Kenya results were not specifically challenged, suggesting that even the opposition accepted the county-level outcomes as legitimate.

When the biggest bloc shifts, the whole map changes. Votrack provides ward-by-ward tracking in all six Mt. Kenya counties and beyond. See exactly where the vote is firming up and where it is eroding. Request a demo for 2027.