感觉（英语：Feeling）是对客观现实个别特性（声音、颜色、气味等）的反映，由来自物质世界的一定刺激直接作用于有机体的一定感觉器官，如光线引起视觉，声波引起听觉；刺激在感官内引起的神经冲动，由感觉神经传导于大脑皮层的一定部位产生感觉。

感觉是感官、脑的相应部位和介于其间的神经三部分所联成的分析器统一活动的结果；无机界没有感觉，只有跟感觉类似的特性，即单纯的物理或化学反映；随着生命出现，产生了生物反映模式，即刺激感应性；刺激感应性已包括感觉的萌芽；正是在刺激感应性基础上发展起来的感觉；动物感觉能力在进化中随分析器的专门化发展；人类的感觉在复杂的生活条件下和变革现实活动中得到高度发展；人与动物的感觉不同，动物的感觉只是自然发展的结果，人的感觉则包括社会发展的产物。

Feeling is the nominalization of the verb to feel. The word was first used in the English language to describe the physical sensation of touch through either experience or ****. The word is also used to describe experiences other than the physical sensation of touch, such as "a feeling of warmth" and of sentience in general. In Latin, sentire meant to feel, hear or smell. In psychology, the word is usually reserved for the conscious subjective experience of emotion. Phenomenology and heterophenomenology are philosophical approaches that provide some basis for knowledge of feelings. Many schools of psychotherapy depend on the therapist achieving some kind of understanding of the client's feelings, for which methodologies exist.