The rainwater collected from daily rainfalls at six rainfall stations in Trinidad over a 1‐year period was analyzed for NH₄⁺, NO₃⁻, urea‐N, Mg²⁺, Ca²⁺, Na⁺, K⁺, Cl⁻, and SO₄²⁻ concentrations. The concentration of these constituents varied from 0.41 to 1.13, 0.41 to 1.24, 0.15 to 0.50, 0.33 to 0.99, 1.88 to 4.52, 1.92 to 2.57, 1.21 to 3.27, 2.10 to 3.93, and 1.89 to 17.75 mg/1 of NH₄‐N, NO₃‐N, urea‐N, Mg²⁺, Ca²⁺, Na⁺, K⁺, Cl⁻, and SO₄²⁻, respectively. Considerable amounts of these constituents were added to the soil through rainfall. Major proportions of NH₄⁺ and NO₃⁻ and some proportions of SO₄²⁻ in rainwater may have been derived from gaseous sources, probably originating from soil. Urea‐N seems to have originated as particulate matter from soil organic matter and microbial cell debris. Greater proportions of Ca²⁺ and K⁺, and smaller proportions of Mg²⁺ and SO₄²⁻ appear to have been derived from terrestrial dust. Sodium, Cl⁻, Mg²⁺ and partly Ca²⁺, K⁺ and SO₄² were derived from marine sources. Thus it appears that the sources of various constituents in the Trinidad rainfall are quite varied.