The acceleration due to gravity at poles is slightly greater than at equator.

Acceleration due to gravity is given by:
$g=\frac{GM}{R^2}$

Where G is the universal gravitational constant, M is the mass of the planet and R is the radius of the planet.
We can see that,
$g\propto \frac{1}{R^2}$

The radius of the earth at the poles is smaller than the radius of the earth at the equator. Due to this the value of g is slightly higher at the poles.