This is a list of all Tier 1 banks in Kenya. Commercial banks in Kenya are categorized into three groups: Tier 1, Tier 2, and Tier 3. This classification is based on a weighted index that considers net assets, capital, reserves, customer deposits, and the number of loans and deposit accounts. Tier 1 banks are considered safe by the Central Bank of Kenya (CBK) and control 75.6 % of the market share in the Kenyan banking sector.
According to the CBK, Tier 1 banks have a weighted index of five percent and above, Tier 2 banks have an index between one and five percent, and Tier 3 banks have a weighted index below zero percent.
Below are the nine Tier 1 banks in Kenya, ranked according to market share. The market share data is obtained from the Central Bank of Kenya's Supervision Annual Report of 2024.
List of Tier 1 Banks In Kenya
| Bank | Market Size Index | Total Assets (Ksh Million) | |
| 1 | KCB Bank Kenya Limited | 16.6 % | 1,277,767 |
| 2 | Equity Bank Kenya Ltd | 12.8 % | 1,027,680 |
| 3 | Co-operative Bank of Kenya Ltd | 9.6 % | 687,823 |
| 4 | NCBA Bank Kenya PLC | 8.3 % | 588,703 |
| 5 | Absa Bank Kenya PLC | 6.6 % | 506,129 |
| 6 | Stanbic Bank Kenya Ltd | 5.7 % | 445,248 |
| 7 | I & M Bank Limited | 5.4 % | 414,873 |
| 8 | Standard Chartered Bank (K) Ltd | 5.4 % | 385,206 |
| 9 | Diamond Trust Bank Kenya Limited | 5.2 % | 381,137 |
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