It lies to the northwest of the large walled plain Gagarin, and to the southwest of the prominent crater Chaplygin.

The outer rim is marked only by a few tiny craterlets and some terrace structures can still be seen along the inner walls.

Near the midpoint of the relatively level interior floor is a low central rise composed of several small hills.

The crater was named after Italian physicist, inventor, and Nobel laureate Guglielmo Marconi by the IAU in 1970.

[2] By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Marconi.