Being an advanced multi-city-state with very limited space, Grennia's industry options are somewhat limited.
Regardless, it can still be financially successful, focusing on exporting and importing a variety of goods.

The top industries by order of revenue include chip manufacturing, electronics, banking and finance, machinery, medical products, and
agriculture (with a focus on vertical farms)

Up until around the late 20th century, fishing was also a prime industry however it has since declined. Today, Grennia primarily imports its fish.

The top importers of Grennian goods include Japan, Mainland China, Indonesia, Hong Kong, Taiwan, the USA, Malaysia,
Thailand, Vietnam, South Korea, Australia, and India.

The average salary in Grennia is approximately 92,000 GND.
As of 2025, minimum wage is set at 21 GND per hour.