| Town |
date established |
parent town |
notes |
| Chemung |
1788 |
original |
|
| Elmira |
10 April 1792 |
Chemung |
named Newtown until 1808 |
| Catharine |
15 May 1798 |
Newtown |
Catharine became part of Schulyer County in 1854 |
| Erin |
29 March 1822 |
Chemung |
|
| Big Flats |
16 Apr 1822 |
Elmira |
|
| Southport |
1822 |
Elmira |
|
| Catlin |
16 Apr 1823 |
Elmira |
|
| Veteran |
16 Apr 1823 |
Catharine |
|
| Cayuta |
24 March 1824 |
Spencer |
Spencer was formed from the towns of Owego and Erin,
which were formed from Chemung. Now part of Schuyler County |
| Dix |
17 April 1835 |
Catlin |
became part of Schuyler County in 1854 |
| Horseheads |
8 Feb 1835 |
Elmira, Chemung |
first new town formed under Chemung County |
| Van Etten |
17 Apr 1854 |
Cayuta |
The remainder of Cayuta remained in Tioga County when Chemung County was formed. |
| Baldwin |
17 Apr 1856 |
Chemung |
|
| Ashland |
25 April 1867 |
Southport |
|
