Kenya’s fight against HIV continues to reveal stark regional disparities, with the latest county-level data highlighting the counties most affected. Nairobi tops the list with 151,916 people living with HIV, followed by Kisumu (111,367) and Homa Bay (104,317). At the other end, Wajir (701) and Mandera (1,322) record the lowest numbers, reflecting variations in population density, urbanization, and historical prevalence trends.
Table: Number of People Living with HIV by County
| Rank | County | People Living with HIV |
|---|---|---|
| 1 | Nairobi | 151,916 |
| 2 | Kisumu | 111,367 |
| 3 | Homa Bay | 104,317 |
| 4 | Migori | 99,510 |
| 5 | Siaya | 82,414 |
| 6 | Kiambu | 63,420 |
| 7 | Mombasa | 56,121 |
| 8 | Kakamega | 51,604 |
| 9 | Nakuru | 51,139 |
| 10 | Busia | 43,155 |
| 11 | Bungoma | 38,481 |
| 12 | Machakos | 35,035 |
| 13 | Kisii | 32,875 |
| 14 | Uasin Gishu | 30,887 |
| 15 | Kitui | 29,790 |
| 16 | Kajiado | 24,307 |
| 17 | Meru | 23,944 |
| 18 | Kwale | 21,622 |
| 19 | Vihiga | 19,659 |
| 20 | Kilifi | 19,096 |
| 21 | Makueni | 18,264 |
| 22 | Kericho | 18,179 |
| 23 | Nyeri | 17,044 |
| 24 | Murang’a | 16,984 |
| 25 | Turkana | 16,925 |
| 26 | Trans Nzoia | 14,840 |
| 27 | Nyamira | 14,791 |
| 28 | Nandi | 14,277 |
| 29 | Narok | 13,598 |
| 30 | Kirinyaga | 11,491 |
| 31 | Bomet | 10,626 |
| 32 | Embu | 9,782 |
| 33 | Taita Taveta | 8,842 |
| 34 | Nyandarua | 7,574 |
| 35 | Tharaka-Nithi | 7,115 |
| 36 | Elgeyo-Marakwet | 6,084 |
| 37 | Laikipia | 6,022 |
| 38 | Baringo | 5,225 |
| 39 | Samburu | 3,468 |
| 40 | West Pokot | 3,113 |
| 41 | Isiolo | 2,385 |
| 42 | Garissa | 1,862 |
| 43 | Lamu | 1,810 |
| 44 | Marsabit | 1,725 |
| 45 | Tana River | 1,708 |
| 46 | Mandera | 1,322 |
| 47 | Wajir | 701 |
Regional Patterns and Analysis
The distribution of HIV across counties shows a concentration in urban and densely populated regions. Nairobi, Kisumu, and Mombasa, all major urban centers, account for a substantial portion of national HIV cases. This reflects a combination of population density, migration patterns, and historical prevalence.
Western Kenya, particularly Homa Bay, Migori, and Siaya counties, remains a hotspot. The region has historically had high prevalence rates, with socio-economic factors, mobility, and limited access to healthcare contributing to sustained high infection rates. These counties account for more than 25% of all HIV cases nationwide.
Counties in arid and semi-arid regions such as Wajir, Mandera, and Tana River report the lowest numbers. Lower population density, fewer urban centers, and lifestyle differences contribute to lower transmission rates, though access to healthcare in these areas remains limited, highlighting potential underreporting.
Implications for Healthcare and Policy
County-level HIV data is crucial for directing resources effectively. High-burden counties require enhanced funding for antiretroviral therapy (ART), prevention programs, and public awareness campaigns. Urban counties like Nairobi and Kisumu may also need targeted interventions addressing high-risk groups, while Western Kenya counties require sustained investment in prevention and treatment infrastructure.
Low-prevalence counties should not be overlooked. Strategic investments in awareness, testing, and treatment can prevent potential spikes, especially in underserved areas where healthcare access is limited.
For businesses in the health sector, this data signals opportunities in medical supply chains, clinics, testing services, and public-private health initiatives, especially in high-prevalence counties.
Kenya’s HIV epidemic remains unevenly distributed across counties. With Nairobi, Kisumu, and Homa Bay bearing the highest burden, targeted interventions are essential to reduce infection rates and improve treatment coverage. Meanwhile, low-prevalence counties, although appearing less affected, still require preventive strategies to sustain low rates and support overall national health goals.
