Community-based growth promotion (CBGP) delivered by community volunteers aims at enhancing the traditional growth monitoring and promotion (GMP) program delivered by community health nurses through the promotion of optimum infant and young child feeding (IYCF) leading to improved child growth. This study compared IYCF knowledge and practices among caregiver–child pairs (0–24 months) receiving child welfare services from CBGP (n = 124) and GMP (n = 108) programs. Semistructured questionnaires were used to interview caregivers on IYCF knowledge/practices and validated food frequency questionnaire used to record infants’ food intakes. Group differences were determined using Chi-square and independent samples t-tests (P < 0.05; 95% confidence interval [CI]). Mean IYCF knowledge scores were similar (CBGP: 10.84 ± 1.69 vs. GMP: 10.23 ± 1.38, P = 0.062). However, more CBGP caregivers (17%) were highly knowledgeable than their GMP counterparts (5%) (P = 0.011). Early breastfeeding initiation (CBGP: 54% vs. GMP: 28%, P < 0.0001), exclusive breastfeeding (CBGP: 73% vs. GMP: 56%, P = 0.001), and timely complementary feeding (CBGP: 72% vs. GMP: 49%, P = 0.014) were reportedly higher among CBGP caregivers. Underweight was 11% (CBGP: 8% vs. GMP: 14%, P = 0.154). Mean dietary diversity scores (10 food groups) were similar (CBGP: 4.49 ± 1.89 vs. GMP: 3.87 ± 1.89, P = 0.057) but more CBGP caregivers (77%) achieved minimum dietary diversity than their GMP counterparts (61%) (P = 0.035). Few caregivers achieved minimum meal frequency (CBGP: 31% vs. GMP: 29%, P = 0.486) and minimum acceptable diet (CBGP: 23% vs. GMP: 21%, P = 0.464) indicators. Number of children under 5 years owned by caregiver (adjusted odds ratio [AOR]: 0.405; 95% CI: 1.13–78.53, P = 0.038), her educational level (AOR: 0.112; 95% CI: 0.02–0.90, P = 0.040), and IYCF knowledge (AOR: 0.140; 95% CI: 0.03–0.79, P = 0.026) significantly predicted optimum child feeding. Nutrition education on optimum complementary feeding and birth spacing strategies should intensify.