A domestic market, also referred to as an internal market or domestic trading, is the supply and demand of goods, services, and securities within a single country. In domestic trading, a firm faces only one set of competitive, economic, and market issues and essentially must deal with only one set of customers, although the company may have several segments in a market.

The term is also used to refer to the customers of a single business who live in the country where the business operates.

There are certain limitations when competing in a domestic market, many of which encourage firms to expand abroad. The main reasons why a business would decide to expand abroad are limited market size and limited growth within the domestic market.