<p>This study assessed the activity of natural radionuclides (²³⁸U, ²³⁴U, ²²⁶Ra, ²³²Th, ²¹⁰Po, and ⁴⁰&#xa0;K), metal(loid) concentrations, and mineral composition in phosphate fertilizers marketed in Uruguay. Forty solid fertilizer samples of different types (NPK (nitrogen, phosphorus, and potassium), ammonium phosphate, triple superphosphate, superphosphate and phosphate rock) were analyzed using gamma and alpha spectrometry, Inductively Coupled Plasma Mass Spectrometry, X-ray Diffraction and Fourier Transform Infrared Spectroscopy. The highest uranium isotope activity concentrations were observed in triple superphosphate (up to 4402 ± 92&#xa0;Bq/kg for ²³⁸U), while phosphate rock exhibited the highest ²³²Th and ²²⁶Ra activity concentration values. The highest values for ⁴⁰&#xa0;K were observed in NPK fertilizer type. All measured radionuclide activity concentrations were comparable to those reported for phosphate fertilizers. Among the analyzed metal(loid)s, all elements regulated under national legislation complied with the established standards. Correlations between uranium radionuclide series confirmed partial disequilibrium probably caused by industrial processing. These findings contribute to the radiological and chemical characterization of fertilizers used in Uruguay and provide baseline data for future environmental assessments.</p>