Of the 19 towns in Delaware County, 15 towns have Town supervisor seats up for election in 2026: Andes, Bovina, Colchester, Davenport, Delhi, Franklin, Hamden, Hancock, Kortright, Masonville, Meredith, Middletown, Roxbury, Stamford, and Walton
| Town | Incumbent | Years in Office | Challenger(s) |
| Andes | Ritchie Gabriel | 1 | ? |
| Bovina | Tina B. Molé [R] | 25 | ? |
| Colchester | Rob Hafele [R] | 1 | ? |
| Davenport | Timothy S. Kelso [R] | 3 | ? |
| Delhi | Maya Boukai [D] | 3 | Mark E. Tuthill [R] |
| Franklin | Donald T. Smith [R] | 3 | ? |
| Hamden | N/A | N/A | Wayne Shepard [R] and Jonathan Killday [D] |
| Hancock | Jerry Vernold [R] | 7 | ? |
| Kortright | George E. Haynes, Jr. [R] | 21 (total) | ? |
| Masonville | Betty L. Scott [R] | 3 | ? |
| Meredith | James G. Ellis [R] | 13 | Stephanie Munro [D] |
| Middletown | Glen Faulkner [D] | 3 | ? |
| Roxbury | Allen Hinkley [R] | 7 | Tom O’Brien |
| Stamford | John S. Kosier [C] | 7 | ? |
| Walton | Joseph M. Cetta [R] | 7 | ? |
