Health
Understand the patterns behind Sri Lanka’s reported dengue cases. Follow the latest reports, the weekly trend and the districts affected.
Reported cases this year
Report dated 12 Oct
Latest reported week
+0.6%
Week 40 · 2026
Most affected district
Gampaha · 21.1% of cases
Reported deaths
Year to week 40 · NDCU
Dengue cases by week
2026NDCU weekly surveillance
1,098
+93.0% vs same week last year
National Dengue Control Unit · Ministry of Health
Disease surveillance
Ministry of Health reports
DengueNDCU · weekly and daily reports
Peak week
Highest weekly count
7,916
Week 27 · 2026
Concentration
Western Province share
46.9%
Colombo, Gampaha & Kalutara
MOH hotspot
Most cases this week
30
Biyagama
Reported cases by district
Report dated 12 Oct
Largest 8 of 28 districts
102,769 island-wide cases
- 1.Gampaha21,700
- 2.Colombo20,023
- 3.Kandy8,003
- 4.Kalutara6,485
- 5.Matara6,359
- 6.Galle5,605
- 7.Ratnapura5,322
- 8.CMC4,140
National Dengue Control Unit · cumulative cases in current calendar year