Abstract: An experiment was carried out to study the effect of planting date and plant density on the yield and yield attributes of five varieties of mungbean. The experiment comprised of four planting dates viz. 03 February,18 February, 05 March and 20 March, five varieties viz. BARIMung-2, BARIMung-3, BARIMung-4, BARIMung-5 and BINA Mung-2 and three planting densities viz., 20x20 cm, 30x10 cm and 40x30 cm. The experiment was laid out in a split-split plot design with three replications. It was observed that early planted (03 and 18 February) crops produced higher yield as compared to late planted (05 and 20 March) crops. Variety BARIMung-2, BARIMung-3 and BARIMung-4 produced higher seed yield as compared to variety BARIMung-5 and BINAMung-2.The 30x10 cm plant density always showed the highest yield performance. Variety BINAMung-2 produced the highest branches plant-1 when planted on 03 February at a spacing of 40x30 cm. The highest pods plant-1 was found in the variety BARIMung-3 when planted at a density of 30x10 cm and planted on 18 February. Pod length was the highest in variety BARIMung-5 planted on 05 March with a plant density of 20x20 cm. The highest 1000- seed weight was obtained in case of variety BARIMung-5 planted on 03 February at densities of 20x20 cm and 30x10 cm. Variety BARIMung-2 planted on 3 February at plant density of 30x10 cm significantly produced the highest seed yield and harvest index and the lowest seed yield and harvest index were found in the variety BARIMung-3 planted on 20 March at a plant density of 40x30 cm.