At what speed does earth travel around the sun?

The speed of the Earth in its orbit around the Sun varies somewhat, because our orbit is an ellipse. When the Earth falls closer to the Sun, we speed up, and as the Earth moves away, we slow down a little. But the eccentricity of the ellipse - the amount that it differs from a circle - is fairly low, so the difference isn't all that great. So on average, the Earth is traveling about 67,000 miles per hour in our path around the Sun.