Over the years, coastal population has been on the increase. This is so because of attractions such as tourism, commerce, recreation etc. among others. But these attractions have only exposed the coastal populace to various environmental risks such as flooding, intrusion of saltwater into freshwater and other negative impacts because of shoreline shift. Even though GIS and Remote Sensing have been successfully applied in assessing shoreline changes overtime, the shoreline change trigger factor of urbanization which defines the rise in the coastal population cannot be ignored. Therefore this study was aimed at assessing the effect of the anthropogenic shoreline change trigger factor of urbanization on shoreline shift on the coastline of Bonny Island Rivers State Nigeria using available geospatial techniques. The methods used included GIS and remote sensing, were Landsat imageries were sourced from 2000-2021 at five year intervals (2000, 2005, 2010, 2015 and 2021), and analysed using linear regression in the DSAS V4.5 and ArcGIS 10.5 environment. Furthermore, a Land Use Land Cover (LULC) operation was carried out in the study area to determine how the land use, especially urbanization has been triggering shoreline shift. Results from the linear regression analysis showed that there has been a dominant scenario of 67.2% accretion over the 21year period studied at an annual maximum erosion and annual maximum accretion rate of -7.4m and 7.9m respectively, with a 15,061.11m section of the shoreline being accreted, and 7338.89m section eroded. Furthermore, the result of the LULC showed that from 2000-2021, built up area, has increased from 8.2% to 11.8%, as the increase noticed in the Finima Beach area accounts for the 32.8% eroded 7338.89m shoreline. Therefore this study stated that urbanization is the main shoreline trigger factor in the study area, as areas such as Ifoko and Ngalaka which still had their natural habitat, had experienced accretion over the Finima Beach area which had eroded because of increase in human activities noticed overtime. Therefore, this research provided projected coordinates of shoreline position by the year 2031, and made appropriate recommendations such as; to establish/strengthen sea defences in the Finima Beach area, and for government to provide laws that protect the environment especially in areas such as Ifoko and Ngalaka, which still had their natural habitat.