The aroma components of cold-pressed peel essential oils of common mandarins (Citrus reticulate Blanco) grown in Jinja and Mbarara regions of Uganda were determined by capillary GC and GC-MS. A total of 43 components qualitatively similar in the oils from the two origins were identified. In the respective oils, limonene (85.9 and 86.9 %), gamma-terpinene (6.0 and 5.4 %), myrcene (2.2 and 2.5 %), alpha-pinene (1.1 and 1.2 %), linalool (1.0 and 0.7 %), beta-pinene (0.3 and 0.5 %), terpinolene (0.3 %), sabinene (0.3 and 0.4 %) and octanal (0.2 and 0.4 %) were the major components.