Is the gravity the same everywhere on mars?

The gravity on any planet is generally about the same wherever you go on any planet. However there are always differences depending on where you are. if you are standing on the top of a mountain then the gravitational force below you is big er then it would be if you were standing in a depression. the same rule applies on earth. the influence of body's such as moons and planets also have an effect on the gravity in any given place on a planet.