鸭亚科（学名：Anatinae）是雁形目鸭科下的一个亚科，其下的物种通常被称为「浅层水鸭」（dabbling ducks），在水面觅食，不会潜入水中。鸭亚科还包含已灭绝的Moa-nalo，是和浅层水鸭演化关系接近的另一支序。

鸭亚科的系统分类地位与其下应包含哪些物种仍有争议。这里显示的分类是只有包括浅层水鸭与已灭绝的Moa-nalo，另一派的观点则认为鸭亚科应包括大部分的鸭，浅层水鸭则被进一步归为此亚科下的鸭族。这种争议反映了鸭科主要之序间关系的争议。

The Anatinae are a subfamily of the family Anatidae (swans, geese and ducks). Its surviving members are the dabbling ducks, which feed mainly at the surface rather than by diving. The other members of the Anatinae are the extinct moa-nalo, a young but highly apomorphic lineage derived from the dabbling ducks.