Largest cities
Riyadh 6,925,000 pop., 8,309,000 urban aggl.
Jiddah 3,713,000 pop., 5,408,000 urban aggl.
Medina 1,412,000 pop., 1,649,000 urban aggl.
Dammam 1,386,000 pop., 2,994,000 urban aggl.
Highest mountains
Jabal Sawda 3,133 m (10,279 ft)
Longest rivers
Only non-permanent rivers
Largest lakes
Only non-permanent lakes
Largest islands
Farasan Island 369 km² (142 sq mi)
Sajid Island 156 km² (60 sq mi)