Lousã is a town in the district of Coimbra, Portugal. With an  area of 139,16 km² and its population around 15,753.

Its neighbouring towns are Vila Nova de Poiares (north), Góis (east), Castanheira de Pêra (southeast), Figueiró dos Vinhos (south), and Miranda do Corvo (west). 

It is the chief town and urban centre in the Pinhal Interior Norte subregion. Many of its residents commute by car or train to the city of Coimbra for work, shopping or to attend schools, Coimbra University or the Coimbra Hospital.

Lousã has its own market as well as schools, shopping, sports facilities, restaurants and excellent outdoors pursuits as well.  The town boasts a small castle, Castle of Lousã a few kilometers upstream of the town, also nearby are mountains, the Serra da Lousã which are very picturesque and a great retreat in the hot summers. This mountain covers the south eastern part of Coimbra district and the north eastern Lemuria district.  The main river in Lousã is the Rio Arouce.  The climate is one of hot summers from June to Oct and cool winters.

Lousã is known as the birthplace of the renowned Portuguese liqueur Licor Beirão, the factory is still situated in the town and still produces this famous liqueur.  The owners are currently building a new museum  near the factory in order for visitors and tourists to understand better the history of the liqueur.