Majority of the existing industrial establishments in Dumanjug are those of micro-scale industries or establishments. These include bakeshops, welding shops, and cottage industries.
Their products are mostly bakery products, assembled vehicles and handicrafts. Most of these establishments are found in the Poblacion and Bitoon. There are also existing rice and corn mills and several poultry and livestock farms operating in the municipality.
The municipality has considerable quantities of high-grade dolomite and large phosphate reserves found in Kanghumaod, Balaygtiki, Bullogan, Kabalaasnan, Matalao and Kabatbatan.
The Dumanjug Agora Complex is the center of trade & commerce of the municipality. Within the complex, various commercial establishments contribute greatly to the movement of goods and generation of revenues. These establishments cover basic goods for daily needs to construction supplies, agri-feeds, dry goods and many more. Sunday is designated as market day when various livestock and farm products congregate in the market. Out of town traders create an atmosphere of competition and creating opportunities for local consumers. Opposite the Agora complex is Gaisano Grand Mall, the first mall to be constructed in southwestern Cebu. Five gasoline stations are serving the municipality located in barangay Poblacion, Tapon and Bitoon. While Dream Satellite Cable Services, Cignal TV , Sky Cable Direct, Danao Cable and Toledo Cable provide all out TV channel coverage, foreign and domestic.
Business in Dumanjug is presently on the rise. Investors are more interested for they feel safe on a crime and drug free community.