Mai'Adua city (or Birnin Maiaduwa) is a city in Katsina state and a Local Government Area in Katsina State, Nigeria, sharing a border with the Republic of Niger.

[1] It has a very large historical urban and rural market operating on Sundays.

The market is international serving as exchange point between Nigeria and Niger Republic.

Livestock, including cattle, sheep, goats, camels, donkeys, and horses are the main commodities mainly from Niger, while grains such as maize, sorghum, millet, and soybean mainly come from Nigeria.

With an average annual temperature of 37°C, 653 mm of rainfall, 263 dry days, and a 30% average humidity, Mai'Adua has a semi-arid climate.