Place
- Cape Elizabeth1
- Cass1
- Charlotte County. 1 mile northwest of St. Andrews. Roadside ditch.1
- Chauncey Marsh Nature Preserve. Chauncey 7.5 minute quadrangle. 4.4 mile east of Chauncey, 1 mile southwest of Embarrass River1
- Cheboygan1
- Chelsea, 4 mi E1
- Chestnut Branch of Mantua Creek1
- Cheung Ping Shi, East of Canton1
- Chikopi1
- Chilón1
- Clementon1
- Clementon, Camden Co.1
- Climax forest1
- Co Rd 11, about midway between its jct with US 60 and Babcock State Park1
- Cockburn I.1
- Cockburn Island1
- Colloroy Beach, outside of Sydney1
- Columbus1
- Comayagua1
- Cordillera1