In the mid 13th century Count Ludwig the Elder von Frohburg built the fortified village of Wiedlisbach to collect tolls and host markets along the road to Zofingen.

The village was built as rectangle with a large central market plaza astride the east-west running road.

When the Frohberg family died out, Wiedlisbach passed to the Counts of Neuchâtel-Nidau in the late 13th century.

Count Rudolph of Neuchâtel-Nidau appears in the record as ruler of nearby Bipp Castle in 1297 and in 1313 was documented as ruling over Wiedlisbach.

However, after a disastrous Kyburg raid in 1383 led to the Burgdorferkrieg and poverty for the family, Wiedlisbach was sold to Bern and Solothurn in 1406.

The uprising was quickly suppressed and on 5 June 1653 the town fell to the attacking government troops.

Of the rest of the land, 19.7% is settled (buildings or roads) and the remainder (1.7%) is non-productive (rivers, glaciers or mountains).