A field experiment was conducted during kharif season of 2023 at Research Farm, School of Agriculture, Suresh Gyan Vihar University Jaipur, to study the “Effect of Nano fertilizer on Productivity and Profitability of Cowpea (Vigna unguiculata L.)”. The experiment was laid out in randomized block design with three replications. The experiment was consisting eight treatments viz., Control, 50, 75, 100% RDN, 75% RDN + one foliar spray of each 2 ml l-1 nano DAP and nano Zn at flowering initiation, 50% RDN + one foliar spray of each 2 ml l-1 nano DAP and nano Zn at flowering initiation, 75% RDN + two foliar spray of each 2 ml l-1 nano DAP and nano Zn at flowering and pod initiation and 50% RDN + two foliar spray of each 2 ml l-1 nano DAP and nano Zn at flowering and pod initiation. The cowpea variety used for study was CPD-119. The experimental results showed that application of 75% RDN + two foliar spray of each 2 ml l-1 nano DAP and nano Zn at flowering and pod initiation produced significantly higher plant height and dry matter accumulation at 50 DAS and at harvest, number of branches plant-1 at harvest, number of total and effective nodules plant-1 at 40 DAS, number of pods plant-1, number of seeds pod-1, seed yield, straw yield and biological yield over rest of treatments but it was remained at par with application of 50% RDN + two foliar spray of each 2 ml l-1 nano DAP and nano Zn at flowering and pod initiation. However, application of 100% RDN significantly increased plant height at 30 DAS over control and application of 50% RDF, remained at par with rest of treatments. Application of 75% RDN + two foliar spray of each 2 ml l-1 nano DAP and nano Zn at flowering and pod initiation recorded significantly higher dry matter accumulation at 30 DAS and test weight of cowpea seed as compared to control and application of 50% RDF, remained at par with rest of treatments