This paper reports 19 species of the genus Dichomeris Hübner, 1818 from Hong Kong Special Administrative Region, China. Three new species are described: Dichomeris argentenigera Li, Zhen & Kendrick, sp. n., D. hamulifera Li, Zhen & Kendrick, sp. n. and D. parvisexafurca Li, Zhen & Kendrick, sp. n.; two species are reported for the first time from China: D. sandycitis (Meyrick) and D. moriutii Ponomarenko & Ueda. The males of D. simaoensis Li & Wang and D. zonata Li & Wang as well as the female of D. sandycitis (Meyrick) are newly described. Images of adults, illustrations of genitalia of the new species and the newly described males and female are provided. A key for identifying the known species of Dichomeris in Hong Kong is given.