Following are five pdf files, each containing part of a county-wide index to the 1915 New York State Census. The reference numbers following each name are either (a) the page number within the town; or (b) the election district/page number for each town. Which reference is used depends on the size of the town.
This census lists the address of the household; the names of all persons living in each household; each person's relationship to the head of household; each person's race, age and sex; each person's country of birth, and if of foreign birth how many years resident in the U.S.; and information about each person's employment.
Copies can be made by emailing the Historian's Office and requesting those you want. The cost is $1 a page plus postage.
1915 A-C | 1915 D-H | 1915 I-M | 1915 N-S | 1915 T-Z |