Yongdeng County (Chinese: 永登县; pinyin: Yǒngdēng Xiàn) is a county of Gansu Province, China, it is under the administration of the prefecture-level city of Lanzhou, the capital of Gansu.

Its postal code is 730300, and its population in 2020 was 520,000 people, of which 454,000 lived in rural communities and 4.5% were minorities.

[1] The economy of Yongdeng County is mainly dependent on agriculture.

The Kushui rose, named after Kushui town in Yongdeng, is known throughout China, and is used in a variety of products such as tea, wine, sauce, snacks, candy, cigarettes, soap, perfume and cosmetics.

[2] Other agricultural produce from Yongdeng include grapes, trout, mutton and various vegetables.