约会（Dating），又称为拍拖，是指预先约定时间地点会面的活动。约会原指一般人士的预约会面，现在通常指恋爱的行为。

恋爱约会是人类求偶活动其中一环，藉相处交谈而了解对方，找出配合度，用作考验及选择出一位作为配偶，过程中亦同时培养并巩固爱情。

单身者一般要经历多次约会，方会成功选择或被选择成为配偶。婚后伴侣间的约会用作以促进双方感情、促进了解，因为人是不断成长和改变的。婚后若与其他人约会，则属于精神外遇，常会受到道德谴责。但要注意的是普通朋友或有业务往来的人单独会面一般不会称为约会。部份人亦会参加快速配对增加与异性约会机会。

Dating is a part of the human mating process whereby two people meet socially for companionship, beyond the level of friendship, or with the aim of each assessing the other's suitability as a partner in an intimate relationship or marriage. It can be a form of courtship consisting of social activities done by the couple. While the term has several meanings, it usually refers to the act of meeting and engaging in some mutually agreed upon social activity in public, together, as a couple.