Roaring Meg may refer to:
- Roaring Meg (cannon), any of several large siege cannon
- Mons Meg, a famous cannon at Edinburgh Castle
- Roaring Meg (river), a tributary of New Zealand's Kawarau River, reputedly named after an infamous gold-rush era prostitute
- Roaring Meg hydro scheme, a hydroelectric scheme on the Kawarau River
- Roaring Meg (Stevenage), a retail park in Stevenage, Hertfordshire, England
- Roaring Meg (waterfall), a waterfall in the Daintree National Park in North Queensland, Australia
- Tecomanthe burungu, also known as Roaring Meg Creek trumpet vine, a climbing plant from Queensland, Australia
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