रैलिडी (Rallidae) छोटे व मध्यम आकार के सार्वत्रिक वितरण वाले ग्रुइफोर्मीस गण के पक्षियों का एक जीववैज्ञानिक कुल है। इसकी कई जातियाँ आर्द्रभूमियों में रहती हैं, हालांकि यह अंटार्कटिका और शुष्क मरुभूमियों के अलावा लगभग हर अन्य क्षेत्र में पाई जाती हैं। घने वनस्पति वाले क्षेत्रों में इनकी अक्सर भरमार होती है।

Rails are a large, cosmopolitan family of small- to medium-sized terrestrial and/or semi-amphibious birds. The family exhibits considerable diversity in its forms, and includes such ubiquitous species as the crakes, coots, and gallinule; other rail species are extremely rare or endangered. Many are associated with wetland habitats, some being semi-aquatic like waterfowl, but many more are wading birds or shorebirds. The ideal rail habitats are marsh areas, including rice paddies, and flooded fields or open forest. They are especially fond of dense vegetation for nesting. The rail family is found in every terrestrial habitat with the exception of dry desert, polar or freezing regions, and alpine areas. Members of Rallidae occur on every continent except Antarctica. Numerous unique island species are known.