Alteckendorf (sometimes spelled Alt Eckendorf) is a French commune in the Bas-Rhin department in the Alsace-Champagne-Ardenne-Lorraine region of northeastern France.
The inhabitants of the commune are known as Alteckendorfois or Alteckendorfoises
Alteckendorf is about 30 km north-west of Strasbourg and 20 km east of Saverne. Covering an area of 572 hectares, the commune is located on the plain of Alsace and more specifically in the area of some loess hills behind Kochersberg and between the Vosges Mountains and Germany. The town is located 177 metres above sea level and is watered by the Landgraben stream, a tributary of the Zorn. It is surrounded by the Koppenberg (256 metres), Englischberg (288 metres), and Schyrberg (250 metres) hills. To the north of the town is the Alteckendorf forest.
The Sarreguemines-Strasbourg railway runs through the commune with a station on the south-east edge of the village.
Neighbouring localities within a radius of 5 kilometres include Minversheim, Ettendorf, Huttendorf, Ringendorf, Lixhausen, Bossendorf, Hochfelden and Schwindratzheim.