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The present investigation was carried out during rabi season of 2016-17, 2017-18 and 2018-19 at College Farm, Navsari Agricultural University, Bharuch (Gujarat) to determine the requirement of nitrogen and phosphorus for dill seed for achieving maximum seed yield. Three different levels of nitrogen (20, 40 and 60 kg/ha) and phosphorus (00, 20 and 30 kg P2O5/ha) in different combination were distributed in the plots. The results indicated that application of nitrogen @ 60 kg/ha significantly increased plant height, branches/plant, number of umbels/plant, seeds/umbel, seed yield (1451 kg/ha) and straw yield (6008 kg/ha), net returns (Rs. 68299/ha) and B:C ratio (2.4), while, significantly higher grain yield (1407 kg/ha) and straw yield (5977 kg/ha), net returns (Rs. 66289/ha) and B:C ratio (2.3) were recorded with application of 30 kg P2O5/ha. It also significantly increased content and uptake of nitrogen and phosphorus at 60 kg N/ha and 30 kg P2O5/ha in seed and straw and also improves nutrient status of soil. Interaction effect between 60 kg N/ha and 30 kg P2O5/ha were found significant higher for umbels/plant and seed yield.