Connecticut - Criteria: C (architecture/engineering)
| Woodbridge Farmstead |
| Woodbridge Green Historic District |
| Woodbury Historic District No. 1 |
| Woodbury Historic District No. 2 |
| Wood, Harcourt, Memorial Library |
| Woodrow Wilson High School |
| Woodruff, Capt. Samuel, House |
| Woodruff, Ezekiel, House |
| Woodruff House |
| Woodruff, Jotham, House |
| Woodruff, Urbana, House |
| Woodstock Academy Classroom Building |
| Woodstock Hill Historic District |
| Woodward, Ashbel, House |
| Woodworth, Nathan A., House |
| Wooster Sawmill and Gristmill Site |
| Wooster Square Historic District |
| World War I Memorial |
| Worthington Ridge Historic District |
| Wylie School |
| Xi Chapter, Psi Upsilon Fraternity |
| Yantic Woolen Company Mill |
| Yeomans, Edward, House |
| Zion Lutheran Church |
Data from United States Park Service and Wikidata
