This study examined the relationship between organisational communication and employee performance in deposit money banks in Port Harcourt. The population of the study consisted of 500 employees drawn from the 15 deposit money banks in Port Harcourt. The sample size for the study was 222 employees determined using Taro-Yamane formular. The study postulated 11 research questions and 11 hypotheses. The study used questionnaire for data collection. The instrument for data collection was validated using face and sampling validity; while the reliability text was determined by Cronbach’s Alpha Coefficient using Statistical Package for Social Sciences (SPSS). Analysis entailed the descriptive illustration of sample characteristics using charts and frequency distributions. The univariate data were analyzed using mean scores and standard deviations which served accordingly as the measure of central tendency and dispersion; while for bivariate data, the spearman’s rank order correlation coefficient statistical tool was used in testing for all hypothesized relationships. The multivariate hypothetical statements were tested using the partial correlation coefficient technique. The results showed a significant effect of the dimensions of organisational communication on the measures of employee performance. Based on the results, it was thus concluded that organizational communication has a significant positive relationship with employee performance in deposit money banks in Port Harcourt and hence recommended that management should ensure that there is consistent recognition of subordinates, updating and informing them of necessary adjustments which may affect their jobs and as well providing platforms to engaging employees in decision-making; these will enhance the capacity and drive of employees to showcase high performing standard through productivity, quality service and effectiveness.