Rotary Club of Baltimore
- District 7620. Founded in 1912. History, officers, meetings, and calendar of events.
- http://www.baltimorerotary.org/

Knights of Columbus, Council No. 2521
- The Cardinal Gibbons Council. Includes purpose, history, events, and membership information.
- http://www.cardinalgibbons2521.org/

Smith College Club of Baltimore
- From the Smith College Club, includes alumnae information, books for sale, contact information.
- http://smith.alumnae.net/homepages/clubs/baltimore/

Junior League of Baltimore
- Dedicated to hands-on volunteering, building friendships, networking and establishing ties with the community. Find out about membership, news and events, projects, the Wise Penny Thrift Store, and Larks choral group.
- http://www.jlbalt.org/