[3] Today, Calasiao is known as a first class, highly commercialized municipality and is strategically located at the heart of Pangasinan.

Upon the arrival of the Spaniards, they called the place "Lugar de Rayos", a literal Spanish translation of the word Kalasian.

Hence in 1660, when the call for the Malong Rebellion came, the citizens picked up their weapons and joined in the fight against the Spanish rule.

The citizens were also one of the first people to answer the call for rebellion of Juan de la Cruz Palaris of Binalatongan (now San Carlos City), which succeeded in driving the Spanish rulers and friars out of the boundaries.

The town of Calasiao became part of the Pangasinan encomendia of Labaya, designated as belonging to the King of Spain, Juan Ximenez del opaline, and a son of Alonso Hernandez de Sandoval for whom tributes were collected.

Calasiao also has a lot of fishponds along its rivers and wetlands where fish like bangus (milkfish), pantat (catfish), and tilapia are raised.

Robinsons Place Pangasinan is a two-level mall built on a 5.8 hectares (14 acres) lot with a gross floor area of 31,900 square metres (343,000 sq ft) and a gross leasable area of 23,000 square metres (250,000 sq ft).

The current mayor is Mamilyn A. Caramat, who took over the mayoralty post from Joseph Arman C. Bauzon, following his victory in the May 2022 elections.

[20] The town is currently led by Mayor Kevin Roy Q. Macanlalay, Vice Nestor Gabrillo, and eight other councilors.

[22] Calasiao puto is made of long grain rice soaked in water, ground and fermented for three days of more, with just enough sugar to taste, and steamed.

[23] The town has the traditional white puto and many flavors like pandan (green), ube (violet), banana (yellow), strawberry (light red/pink) and cheese (gold).

Bella's Puto is sold at four SM shopping mall branches, in Santa Mesa (Manila), Baliwag (Bulacan), Clark (Pampanga) and Rosales (Pangasinan).