非异性恋（英语：Non-heterosexual）是一个雨伞术语（即集合性术语），可以用来描述同性恋、双性恋、泛性恋以及其他不再被认为是异性恋的人。 该术语定义了“什幺是社会规范以及一个特定群体如何不合规范的概念”。 非异性恋被用在女权主义和性别研究领域，也在学术作品中用来区分性取向，而使用它可以有多种理解。 该术语和酷儿(queer)很类似，只不过没有后者的政治寓意，显得更有学术气息。“酷儿”一词一般是指不合社会常规且非异性恋。 一些观点认为该术语富于争议且充满轻蔑以为，因为它“给不符合异性恋常规的人贴上标签，以此来强调异性恋即正常”。 而其他人则认为非异性恋一词只是一个在研究领域保持一致性的有用术语，他们认为该术语“凸显了我们的语言在性取向方面的不足”。例如，该术语的使用可以使忽视双性恋的趋势消减。 然而非异性恋者未必包含跨性别者与双性人，因为跨性别者与双性人中也有异性恋者。而无性恋与有性恋则是另一个光谱，取决于是否对他人有性欲，一个无性恋者也有可能有情感上的性倾向。

Non-heterosexual is a sexual orientation or sexual identity that is not heterosexual. The term helps define the "concept of what is the norm and how a particular group is different from that norm". Non-heterosexual is used in feminist and gender studies fields as well as general academic literature to help differentiate between sexual identities chosen, prescribed and simply assumed, with varying understanding of implications of those sexual identities. The term is similar to queer, though less politically charged and more clinical; queer generally refers to being non-normative and non-heterosexual. Some view the term as being contentious and pejorative as it "labels people against the perceived norm of heterosexuality, thus reinforcing heteronormativity". Still others note non-heterosexual is the only term useful to maintaining coherence in research and suggest it "highlights a shortcoming in our language around sexual identity"; for instance, its use can enable bisexual erasure.