With the recent expansion of cotton acreage in Georgia, the practice of planting cotton following cotton instead of following peanuts, corn or soybeans has increased significantly. The objective of this research was to determine the optimum N rate for cotton following cotton on Coastal Plain soils. A field study was conducted from 1993 through 1996 at the University of Georgia Coastal Plain Experiment station in Tifton, GA. Cotton plots were established on a Tifton loamy sand soil following peanuts and fertilized with 0, 20, 40, 60, 80, 100 and 160 lb N/a on the same plots each year of the study. In 1993 following peanut, there was no yield response above the 20 lb N/a rate, indicating the current recommendation of 30 to 40 lb N/a is adequate. In 1994, the first year following cotton, 80 lb N/a was the optimum rate. Growing conditions and yields were excellent, thereby justifying a higher N rate than the currently recommended 60 lb N/a. In both 1995 and 1996, the third and fourth years of continuous cotton, the optimum N rate was 100 lb N/a. Therefore, N rates above the 60 lb/a base rate may be justified for cotton following cotton on Coastal Plain soils, especially at yield levels above the statewide average as produced in this study. There was no yield advantage for N rates above 100 lb N/a in any year of the study. In 1996, cotton yield actually decreased at a rate above 100 lb N/a, indicating possible detrimental effects of excessive N fertilization on this soil.