Alpnach is a village in the canton of Obwalden in Switzerland. It comprises the villages of Alpnach Dorf, Alpnachstad and Schoried.
History
Alpnach is first mentioned about 870 as Alpenacho. Over the last 10 years the population has grown at a rate of 11.1%. Most of the population () speaks German (89.7%), with Albanian being second most common ( 2.3%) and Portuguese being third ( 1.8%). the gender distribution of the population was 50.8% male and 49.2% female. there are 1,828 households in Alpnach.
{| class="wikitable"
|-
! year
! population
|-
| 1799
| 1,157
|-
| 1850
| 1,622
|-
| 1900
| 1,779
|-
| 1950
| 3,022
|-
| 2000
| 4,932
|-
|}
Transport
Alpnach is served by Alpnach Dorf station and Alpnachstad station on the Brünig line, an inter-regional narrow-gauge railway from Interlaken to Lucerne. The half-hourly Lucerne S-Bahn S5 service between Giswil and Lucerne stops at both stations, whilst the hourly InterRegio train between Interlaken and Lucerne normally stops only at Alpnach Dorf station. Alpnachstad is also served by Lake Lucerne shipping services of the Schifffahrtsgesellschaft des Vierwaldstättersees (SGV), providing an alternative connection to Lucerne and other lakeside communities. Alpnachstad PB railway station, located across the street from Alpnachstad station, is the terminus of the Pilatus Railway to the summit of Mount Pilatus.
Alpnach is also home to the Alpnach Air Base of the Swiss Air Force.
Sights
thumb|Pilatusbahn, the world's steepest rack railway
The main sights of Alpnach include the world's steepest rack railway to the mountain Pilatus, a Roman mansion, and a hand-operated print shop.