Altwis is a former municipality in the district of Hochdorf in the canton of Lucerne in Switzerland.

Of the agricultural land, 48.97% is used for farming or pastures, while 14.83% is used for orchards or vine crops.

Of the settled areas, 4.14% is covered with buildings, 0.69% is industrial, 0.34% is classed as special developments, and 2.07% is transportation infrastructure.

Most of the population (as of 2000[update]) speaks German (89.8%), with Albanian being second most common ( 8.2%) and Spanish being third ( 0.6%).

In the 2007 election the most popular party was the CVP which received 29.3% of the vote.

The age distribution in Altwis is; 101 people or 27.3% of the population is 0–19 years old.

In the 2000 census[update] the religious membership of Altwis was; 266 (75.1%) were Roman Catholic, and 23 (6.5%) were Protestant, with an additional 1 (0.28%) who was of some other Christian faith.