Altorf (French pronunciation: [altɔʁf] ^ⓘ; German: Altdorf; Alsatian: Àldorf) is a commune in the Bas-Rhin department in the Grand Est region of northeastern France.

The commune has been awarded one flower by the National Council of Towns and Villages in Bloom in the Competition of cities and villages in Bloom.

A part of the Canton of Molsheim and also its arrondissement, Altorf is located about 15 kilometres west of Strasbourg. The A352 National Highway runs from east to west across the southern portion of the commune but has no exit. Access to the commune is by road D392 which runs parallel but north of the highway and connects with Highway exit 8 to the east of the commune and west to Dorlisheim. Another access road is the D127 which comes from Jaegerhof just over the northern border (and where there is a railway station) south to the village then continuing south to Griesheim-pres-Molsheim. There are also a number of small country roads covering the commune. Most of the commune is farmland with some forests in the north-eastern portion.

The Bras de la Bruches flows through the commune from west to east, through the village then east to join the Muelbach and flows east under the name Altorfer Arm until it joins the La Bruche river north of Eintzheim Airport. In the north-east another waterway forms the north-eastern border of the commune.

The only other hamlet in the commune is that of Forstoff north-east of Altorf village.

It was known as Altum Coenobium in 787.

The origin of the commune name Altorf is from the form Alt-dorf (old town). The old spelling was still visible before the Second World War.

However the spelling Altorf through Altorfium / Atorfium (related to Altum Coenobium) it is more likely to come from the Latin root altum.