The study investigates the relationship between business information systems and organisational performance in Telecommunication Sector in Bayelsa State. The research employs a descriptive survey. The target population is made up of 106 employees from particular Bayelsa State-based telecommunications companies, namely the MTN Nigeria, Globacom, Airtel Nigeria, and 9mobile branches. Through the use of standardized questionnaires, the researcher collected primary data directly from participants. Data collected was analyzed using inferential statistics (Spearman rank order correlational coefficient) with the aid of SPSS. The results show significant relationships between all dimensions of business information systems (BIS) and measures of quality service delivery, based on data generated and analyzed in the study examining the relationship between BIS and organizational performance in the Bayelsa State telecommunications industry. is recommended that businesses give media agencies top priority when it comes to communication plans. This proactive strategy improves competitive positioning and market control in addition to increasing brand visibility. Efficient communication across media platforms fosters consumer loyalty and trust, which supports the expansion and viability of organizations