| City | Province/Region | Key Features |
| Algeciras | Cádiz / Andalusia | Spain's #1 port by volume; 2nd in Med. Strait of Gibraltar. Transshipment hub, ro-ro, containers, bunkering. 100M+ tonnes/yr. |
| Barcelona | Barcelona / Catalonia | #2 in Spain; #1 in Med for cruises. Containers, vehicles, ferries (Balearics, Italy). Urban port (WTC, Maremagnum). |
| Valencia | Valencia / Valencian Community | #3 in Spain; #1 Med container throughput (5.8M TEU). Auto, ceramics, perishables. Expanding. |
| Cartagena | Murcia | Naval base (Arsenal), oil/gas, petrochemicals, LNG regasification. Deep water, sheltered. |
| Málaga | Málaga / Andalusia | Cruise, ro-ro, containers, fishing. Expanding cruise terminal. Costa del Sol gateway. |
| Tarragona | Tarragona / Catalonia | Petrochemical complex (Repsol), bulk liquids, containers. Roman ruins adjacent. |
| Las Palmas de Gran Canaria | Las Palmas / Canary Islands | Mid-Atlantic hub. Bunkering (#1 globally), transshipment, fishing, cruise, offshore supply. |