The orbital speed of Mars varies slightly depending on its position in its elliptical orbit around the Sun.

Here's a breakdown:

* Average orbital speed: 24.1 kilometers per second (km/s)

* Perihelion (closest to the Sun): 26.5 km/s

* Aphelion (farthest from the Sun): 21.9 km/s

So, the average orbital speed of Mars is 24.1 kilometers per second.