he municipality of Santa Lucia is located along the western coast of Northern Luzon and lies on the Southern part of the province of Ilocos Sur.  It is bounded on the North by the City of Candon, on the East by the Municipality of Salcedo, on the South by the Municipality of Santa Cruz and on the West by the China Sea.  It is 69.3 kilometers South of the City of Vigan, the provincial capital, 70 kilometers from San Fernando City, the regional capital  and 338 kilometers north of Manila.

The municipality is classified as a fourth income class municipality, it consists of thirty –six (36) barangays with total land area of 46.92 square kilometers and a population of 22,363.  Out of the 46.92 square kilometers, 4,297.55 hectares are agricultural lands, 122.60 hectares are residential lands, 2.58 hectares are commercial/industrial lands, 73.68 hectares are public utility lands and 3.37 hectares belong to the religious sector.

Predominantly, Santa Lucia is an agricultural municipality, its major crop is rice followed by tobacco, corn, vegetables, peanuts, watermelon and mangoes. 

Santa Lucia is fast becoming a center of trade and commerce, it has now a number of commercial establishments operating, which provides additional revenue to the municipality. These establishments are as follows:  sari-sari stores, tailoring/dress shops, drug stores, bakeries, rice mills, gasoline station, eateries, computer shop, cable services and funeral parlors.

The municipality also enjoys a number of infrastructure and public facilities like 14 schools,  district hospital, 1 rural health unit and 4 health centers, 1 covered auditorium.

It is also a potential tourist destination.  Its church is a historical landmark usually visited by foreign and local tourists.  Its beaches are among potential tourist destinations especially during summer time.