Code (Indonesian pronunciation: [tʃode]; Indonesian: Kali Code) is the name of a river that flows through the city of Yogyakarta on the island of Java, Indonesia. Pollution is a problem along the river. Sayidan Bridge crosses the river.

The river flows in the southern central area of Java with predominantly tropical savanna climate (designated as As in the Köppen-Geiger climate classification). The annual average temperature in the area is 24 °C. The warmest month is September, when the average temperature is around 27 °C, and the coldest is April, at 20 °C. The average annual rainfall is 2802 mm. The wettest month is January, with an average of 538 mm rainfall, and the driest is September, with 8 mm rainfall.

Settlements by poor people have been created beside the river over time. Also loss of housing close to the river has occurred during severe eruptions from Mount Merapi.