How many sprinkler heads are on a zone

Rotor zone will typically have from 3-5 heads on them and mist zones will typically have from 5-12 heads on them, depending on where they are located.  A zone on the side of a house will usually have 5 mist heads where zones on boulevards may have 10.  Size of the zone usually depends on location of the zone.

See also what is a sprinkler zone