Cos Cob Library
🏢 Greenwich Library · GREENWICH, Connecticut
Cos Cob Library
Cos Cob Library is the hub of the Cos Cob neighborhood, occupying a recently renovated building with an expanded children's Rotunda and a new McArdle Community Room for programs and events.
🕑 Library Hours
| Monday | 12 PM – 8 PM |
| Tuesday | 9 AM – 6 PM |
| Wednesday | 9 AM – 6 PM |
| Thursday | 9 AM – 6 PM |
| Friday | 9 AM – 5 PM |
| Saturday | 9 AM – 5 PM |
| Sunday | Closed |
Hours may vary on holidays.
📍 Location & Contact
Address: 5 Sinawoy Rd., GREENWICH, CT 06807
Phone: 2036226883
Website: greenwichlibrary.org
📖 About Cos Cob Library
<p>Cos Cob Library serves the historic Cos Cob section of Greenwich, Connecticut, from its current home at 5 Sinawoy Road. The branch recently completed a significant renovation and expansion funded through a combination of capital improvement appropriations and private fundraising led by the Friends of Cos Cob Library through their "Light the Way Campaign." The renovation added roughly 600 square feet, relocated the children's section into a spacious Rotunda, and expanded the McArdle Community Room to accommodate a fuller calendar of music, film, and cultural events for all ages.</p>
⭐ What makes this branch special
- Recently renovated with ~600 sq ft of added space
- Children's section in the new Rotunda with board books & picture books
- Expanded McArdle Community Room for programs and meetings
- Adult non-fiction reading nook and free wireless printing
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❓ Frequently Asked Questions
What is the McArdle Community Room at Cos Cob Library?
The McArdle Community Room is a dedicated event space inside Cos Cob Library that was expanded as part of the branch's recent renovation. It hosts music programs, movie nights, cultural events, and community meetings open to Greenwich residents.
When did the Cos Cob Library renovation happen?
The renovation was completed recently and added approximately 600 square feet to the building. It was funded by a combination of public capital improvement appropriations and private fundraising by the Friends of Cos Cob Library through their 'Light the Way Campaign.'
Is Cos Cob Library open on Sundays?
No, Cos Cob Library is closed on Sundays. It is open Monday from 12 PM to 8 PM, Tuesday through Thursday from 9 AM to 6 PM, and Friday and Saturday from 9 AM to 5 PM.
✓ Hours & details last verified from official sources in September 2026.