The investigation was conducted from November 2021 to May 2022 at the Agronomy Field Laboratory of the Bangladesh Agricultural University (BAU), Mymensingh, to determine the impact of nitrogenous fertilizer on the yield performance of boro rice varieties. Three replications of the experiment were set up using a randomized full block design. According to the data, variety had a substantial impact on boro rice's yield and yield components. From BRRI Hybrid dhan5, the most harvest index (47.26%), highest grain yield (7.50 t ha-1), highest straw yield (8.32 t ha-1), and maximum 1000-grain weight (30.22 g) were obtained. Varying nitrogen concentrations also had a big impact on boro rice yield. The maximum RD of N from USG (N4) produced the highest grain yield (5.95 t ha-1), highest straw yield (6.85 t ha-1), and highest 1000-grain weight (23.71 g). The BRRI Hybrid dhan5 with 100% of RD of N from urea yielded a 1000-grain weight (30.65 g) and harvest index (48.02%) in the event of an interaction. With the application of 100% of RD of N from USG, BRRI Hybrid dhan5 yielded the best number of effective tillers hill-1 (11.47), grains panicle-1 (161), straw yield (9.67 t ha-1), and highest grain yield (8.88 t ha-1). A conclusion that can be drawn from the study's findings is that BRRI Hybrid dhan5 combined with USG application may be suggested in order to maximize grain production and improve weed control during boro season.