The incidence of malnutrition in the first two years of life has been directly linked with inappropriate complementary feeding practices along with high infectious disease levels. This study was therefore aimed to assess the complementary feeding pattern among mothers of children aged zero to two years in selected health centres in Ado Ekiti, the capital of Ekiti State, Nigeria. The study was cross-sectional in design. One hundred and thirty-five mothers were selected from two health centres within Ado-Ekiti for this study. A semi-structured interviewer-administered questionnaire was used to collect information from the mothers. The questionnaire included questions that assessed the mothers’ socio-demographic characteristics and complementary feeding pattern. Most (62.5%) infants were introduced to complementary foods at 3–5 months old and water (43.3%) at 3 months of age. The main food item given to the infants on commencement of complementary feeding was formula food (45.9%) followed by fermented cereal gruel (37%). The timing of introduction for different food items revealed that in contrast to the use of fermented cereal gruel (23.8%), fewer children were introduced to iron-rich foods (15.1%) and fruits (11%) at 6 months to a year old. Mother’s knowledge of ideal age for the introduction of complementary feeding ( 20.547; p < 0.001) associated significantly with the age of introduction of complementary feeding. More than three-fifth (62.5%) of the respondents had commenced complementary feeding to their infants between 3 and 5 months while an excess of two-fifth (43.3%) of the respondents started giving their children water to drink at 3 months of age. Nurses and nutritionists in primary health care centers should take the lead role in educating mothers about the need for exclusive breastfeeding for the first 6 months of life and appropriate complementary feeding for ages 6–24 months.