Elevated blood pressure (BP) is the leading cause of global mortality, but control rates remain poor because most patients, especially in Africa, are unaware. May Measurement Month (MMM) is an annual global BP screening campaign that was initiated by the International Society of Hypertension (ISH) in 2017 to raise awareness of raised BP. Following participation in 2017 and 2018, Kenya participated again in 2019 and the results are reported here. Screening was carried out in 30 sites by volunteers coordinated by the Kenya Cardiac Society. Participants had three BP readings by standard methods with the last two being averaged and recorded. Heart rate, weight, height, socio-demographic parameters, and co-morbidities were documented. Hypertension was defined as a systolic BP (SBP) ≥140 mmHg and/or a diastolic BP (DBP) ≥90 mmHg or being on treatment with at least one antihypertensive medication. A total of 33 992 participants were screened, mean age was 42.5 (SD 16.8) years and 58.7% of participants were female. Only 27.3% had their BPs checked within the preceding 12 months. After multiple imputation, 26.1% were hypertensive, of whom 34.5% were aware of their hypertension and 31.5% were on treatment. Of those on treatment, 59.7% were controlled translating to 18.8% of all hypertensives. Being on treatment for hypertension, overweight, obese or having had hypertension in previous pregnancy were associated with increased SBP and DBP, while diabetes was associated with raised SBP. Two-thirds of hypertensives were unaware. Only a third of those aware were on treatment, with about 60% of these controlled. Lack of awareness remains a significant barrier to BP control. Programmes to raise awareness such as MMM are significant in raising population awareness.