Kiamba has purely an agriculture-based economy; hence, majority of its income is derived from farming. Of the total land area of the municipality, Thirty five percent (35%) or about 15,097.19 hectares is devoted to agriculture.
Coconut ranks number one in the total agricultural area planted, occupying a total land area of 7,586.73 hectares or 15%. Second to coconut is rice totaling to 1,221.69 hectares both irrigated and non-irrigated. Corn on the other hand is also grown in the area with 854.75 hectares. High value commercial crops (HVCC) such as banana, coffee, rubber, fruit crops, vegetables and abaca are also promising crops grown in the municipality. These HVCC’s are usually intercropped under coconut trees occupying an area of 2,154.63 hectares in the entire municipality.
Forty percent (40%) of Kiamba’s total population are fishermen. An estimated average of 4-5 % of the fisherfolks are improving their socio-economic standard of living due to shipment from municipal fishing banca to commercial fishing
The Kiamba has three commercial livestock, a backyard, piggery, cattle ranch, and goatery. Only four barangays has a piggery: Lomuyon, Tambilil, Suli and Luma. Lomuyon has the biggest production in piggery in which it has 100 heads capacity and in a year the volume is 1,000 and a value of Php.6, 400,000 with an area of 2 hectares while Brgy. Suli has the smallest production and is identified as a backyard .