A field experiment was conducted to evaluate the effect of irrigation levels and mulching on growth of groundnut (Arachis hypogaea L.) in study. The treatment comprised of 4 levels of irrigation viz., 0.4, 0.6, 0.8 and 1.0 ETc (Crop evapotranspiration) in the main plot and three mulch viz., no mulch, straw mulch and plastic mulch in the sub-plot in Split-plot design. The soil was poor in organic carbon (0.11%), low in available nitrogen content (86.41 kg/ha) and medium in phosphorus (33.4 kg/ha) but high in available potassium (337.0 kg/ha) content and slightly alkaline in reaction (pH 8.4). The groundnut crop was grown by following the recommended package of practices for zone- IC (hyper arid partially irrigated western plain zone). Irrigation level at 1.0 ETc gave higher dry matter accumulation, Crop growth rate, total chlorophyll content and among the mulches plastic mulch recorded higher dry matter accumulation, crop growth rates, total chlorophyll content and dry weight of nodules. The interaction effect of irrigation levels and mulch was also found to be significant. Crop growth rate (CGR) was highest under 0.8 ETc along with plastic mulch and relative growth rate which was highest under 0.8 ETc without mulch.