The electronic transport coefficients of Nowotny-Juza NaZnX (X = P, As and Sb) compounds were evaluated by using the semi-classical Boltzmann and the rigid band model. The compounds are direct band gap (Cv-Cc) semiconductors with energy band gaps of about 1.8, 1.47 and 0.25 eV, for NaZnX (X = P, As and Sb) respectively. A maximum value of electrical conductivity of about 5.4 x 10(20) (Omega ms)(-1) and 5.1 x 10(20) (Omega ms)(-1) is achieved at 0.2 mu (eV) for n-type of NaZnP and NaZnAs, while for NaZnSb a maximum value of about 4.1 x 10(20) (Omega ms)(-1) is found at -0.15 mu (eV) for p-type and 4.2 x 10(20) (Omega ms)(1) at 0.15 mu (eV). The investigated materials exhibit the highest value of Seebeck coefficient at 300 K of about 300, 250, 510 (mu V/K) for p-type and -290, -240, -305 (lV/K) for n-type of NaZnX (X = P, As and Sb) respectively. In the chemical potential region between -/+ 0.6, -/+ 0.5, -/+ 0.025 mu (eV) NaZnP, NaZnAs, NaZnSb respectively exhibit a minimum value of electronic thermal conductivity. Therefore in these regions the investigated materials can give maximum efficiency.