Richwoods sedge
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Poales
- family: Cyperaceae
- genus: Carex
- species: Carex oligocarpa
- Niagara Falls
Ontario
Canada- Athens
- Decatur
- Naperville
- North Peoria
- Peoria
- Urbana
- West Peoria
Illinois- Marshalltown
Iowa- Manhattan
Kansas- Lexington
Kentucky- Schoolcraft
Michigan- De Soto
- Independence
Missouri- Newton
New Jersey- Dexter
- Niagara Falls
- Penn Yan
- Rochester
- Watertown
New York- Columbus
Ohio- Lancaster
- Perkasie
- Sellersville
Pennsylvania- Middlebury
Vermont
United States