Short answer: Yes.
Long answer: Yes, but nominally.
According to Newton’s laws of motion, the earth’s rotation causes the surface to bulge just a bit at its middle, or equator, as the sphere’s natural tendency is to continue in a straight line. This bulge creates an uneven gravitational field, and since the equator is the farthest point from each magnetized pole, the planet exerts less force on you, making you lighter. (The amount of pull the Earth exerts on you decides how much you weigh. You wouldn’t weigh the same on Mars as you do on Earth because of the differences in gravity.) But before everyone starts dumping their diets and moving to the equator, keep in mind that the difference is only .5 percent less than at the poles – which means that if you weigh 200 pounds where you live, you will weigh less than a pound lighter near the equator. Sorry, dieters!
(via Life’s Little Mysteries)