Based on the properties of a Primitive Pythagorean Triple (PPT), a computer program was written to generate, print, and count all PPTs greater than or equal to I[subscript x], where I[subscript x] is an arbitrarily chosen integer. The Density of Primitive Pythagorean Triples may be defined as the ratio of the number of PPTs whose hypotenuse is less than or equal to I[subscript x], to I[subscript x] (PPTs/I[subscript x]. The PPT Density for all PPTs with a primitive hypotenuse less than or equal to I[subscript x], remains rather stable, even as I[subscript x] is increased from 5 to 1,000,000. Using a TI-83 calculator, a linear regression correlation between the number of PPTs and the value of Ix, using 36 data points distributed between I[subscript x] = 1,000 and I[subscript x] = 1,000,000 was determined and the results are as shown: Number of PPTs = (0.1591543612)I[subscript x] - 0.726456424; r = 0.999999992.