Tumby can refer to a number of articles.
- Tumby Bay (previously known as Tumby) is a town in South Australia
- Tumby Island is an island in Tumby Bay
- Tumby Woodside is a placename in Lincolnshire, England
- Tumby is a placename in Lincolnshire, England
- Tumby Moorside is a placename in Lincolnshire, England
- Tumby develops enhancements for Tumblr users.