尺蛾科（学名：Geometridae），又名尺蠖蛾科，是鳞翅目尺蛾总科之下的其中一个有庞大成员的科，下计有3.5万个品种。

尺蛾科的学名Geometridae来自希腊语，由「大地」（γη 或 γαια）与「量度」（μέτρων）组成，因为其幼虫的移动形态就好像在丈量一样。

The geometer moths are moths belonging to the family Geometridae of the insect order Lepidoptera, the moths and butterflies. Their scientific name derives from the Ancient Greek geo γη or γαια 'the earth' and metron μέτρων 'measure' in reference to the way their larvae, or inchworms, appear to "measure the earth" as they move along in a looping fashion. A very large family, it has around 35,000 species of moths described, and over 1400 species from six subfamilies indigenous to North America alone. A well-known member is the peppered moth, Biston betularia, which has been subject of numerous studies in population genetics. Several other geometer moths are notorious pests.