Wenslingen is a municipality in the district of Sissach in the canton of Basel-Country in Switzerland.
Wenslingen has an area, , of . Of this area, or 62.3% is used for agricultural purposes, while or 29.9% is forested. Of the rest of the land, or 6.6% is settled (buildings or roads), or 0.2% is either rivers or lakes.
Of the built up area, housing and buildings made up 3.9% and transportation infrastructure made up 2.5%. Out of the forested land, all of the forested land area is covered with heavy forests. Of the agricultural land, 45.9% is used for growing crops and 14.2% is pastures, while 2.2% is used for orchards or vine crops. All the water in the municipality is flowing water.
The blazon of the municipal coat of arms is Per pale, Or, a Pine tree Vert issuant from a Base Sable, and Gules, a head of wheat Or.
Wenslingen has a population () of . , 5.3% of the population are resident foreign nationals. Over the last 10 years (1997–2007) the population has changed at a rate of 7.1%.
Most of the population () speaks German (643 or 98.2%), with French being second most common (3 or 0.5%) and Serbo-Croatian being third (2 or 0.3%).
the gender distribution of the population was 50.9% male and 49.1% female. The population was made up of 656 Swiss citizens (94.4% of the population), and 39 non-Swiss residents (5.6%) Of the population in the municipality 249 or about 38.0% were born in Wenslingen and lived there in 2000. There were 213 or 32.5% who were born in the same canton, while 137 or 20.9% were born somewhere else in Switzerland, and 29 or 4.4% were born outside of Switzerland.
In there were 9 live births to Swiss citizens and 1 birth to non-Swiss citizens, and in same time span there were 5 deaths of Swiss citizens. Ignoring immigration and emigration, the population of Swiss citizens increased by 4 while the foreign population increased by 1. There was 1 non-Swiss man who immigrated from another country to Switzerland. The total Swiss population change in 2008 (from all sources, including moves across municipal borders) was an increase of 5 and the non-Swiss population increased by 2 people.