Wagenhausen has an area, as of 2009, of 11.84 square kilometers (4.57 sq mi).
 Of this area, 6.36 km² (2.46 sq mi) or 53.7% is used for agricultural purposes, while 3.45 km² (1.33 sq mi) or 29.1% is forested.
  Of the rest of the land, 1.35 km² (0.52 sq mi) or 11.4% is settled (buildings or roads), 0.52 km² (0.20 sq mi) or 4.4% is either rivers or lakes and 0.14 km² (35 acres) or 1.2% is unproductive land.

Of the built up area, industrial buildings made up 4.5% of the total area while housing and buildings made up 0.7% and transportation infrastructure made up 0.6%.
 Power and water infrastructure as well as other special developed areas made up 1.1% of the area while parks, green belts and sports fields made up 4.6%.
 Out of the forested land, 27.1% of the total land area is heavily forested and 2.0% is covered with orchards or small clusters of trees.
 Of the agricultural land, 51.5% is used for growing crops, while 2.2% is used for orchards or vine crops.
 All the water in the municipality is flowing water.
 Of the unproductive areas, 1.2% is unproductive vegetation.

In 1995 Rheinklingen merged into Wagenhausen.
Wagenhausen has an area, as of 2009, of 11.84 square kilometers (4.57 sq mi).  Of this area, 6.36 km² (2.46 sq mi) or 53.7% is used for agricultural purposes, while 3.45 km² (1.33 sq mi) or 29.1% is forested.   Of the rest of the land, 1.35 km² (0.52 sq mi) or 11.4% is settled (buildings or roads), 0.52 km² (0.20 sq mi) or 4.4% is either rivers or lakes and 0.14 km² (35 acres) or 1.2% is unproductive land.
Of the built up area, industrial buildings made up 4.5% of the total area while housing and buildings made up 0.7% and transportation infrastructure made up 0.6%.  Power and water infrastructure as well as other special developed areas made up 1.1% of the area while parks, green belts and sports fields made up 4.6%.  Out of the forested land, 27.1% of the total land area is heavily forested and 2.0% is covered with orchards or small clusters of trees.  Of the agricultural land, 51.5% is used for growing crops, while 2.2% is used for orchards or vine crops.  All the water in the municipality is flowing water.  Of the unproductive areas, 1.2% is unproductive vegetation.
In 1995 Rheinklingen merged into Wagenhausen.
Wagenhausen