Salt tolerant variety BR 41 was grown in kharif 2 season by pot experiment to study the effects of salinity and potassium fertilizer on agronomic characteristics of rice (Oryza sativa L.). The agronomic parameters increased with increasing salinity up to 12 dSm-1 level but with plant height. The increase in tiller number, panicle number, shoot dry matter and total grain yield was statistically significant at 5% (LSD0.05) level, whereas the increase in 1000 grain weight was significant at 1% (LSD0.01) level. Application of potassium fertilizer at different salinity levels did not produce significant change in agronomic parameters with an exception in shoot dry matter.