Located in southern Europe, Portugal shares the Iberian Peninsula with Spain. It is the westernmost country of Europe. It bordered by the Atlantic Ocean to the west and south and by Spain to the north and east. The archipelagos of the Azores and Madeira and also part of Portugal.
Here is an interactive map of Portugal:
Obviously this is a map for general references only. If you plan to rent a car and drive in Portugal, you will need a good driving map (which you can purchase once you get there or you can download from specialized websites). It is advisable to get a map of the region you will be driving in because the regional maps are more detailed and even the smaller roads are marked properly.
When it comes to visiting cities on foot, you can get the free maps offered by the majority of hotels or hostels in Lisbon , for example. Or you can get this Lisbon Pop Out Map which you can fit in your day pack or bag.