Little McPherson Bayou is a bay located in Pinellas County, Florida. It appears on the Pass-a-Grille Beach USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 0.00 feet (0.00 m) above sea level. The nearest populated place is Don Ce-Sar Place (historical), approximately 0.4 miles to the NNW.