This report provides data on the resources and expenditures of libraries in 160 state institutions in New York for the year 1985-86 and in 171 institutions for 1986-87. Six state departments are represented: Correctional Services, Education, Health, Mental Health, Youth, and the Office of Mental Retardation and Developmental Disabilities. Data include: (1) total residential population; (2) print materials beginning, added, and total; (3) nonprint materials; (4) total holdings; (5) subscriptions; (6) interloan transactions; (7) circulation; (8) hours open/week; (9) percent of population with direct access; (10) paid professional staff; (11) paid support staff; (12) salaries; (13) expenditures for materials; (14) expenditures for materials per capita; (15) other expenditures; and (16) total expenditures. A comparative summary of library expenditures in New York State institutions for 1979 to 1987 is broken down by department. A list of abbreviations, a map of public library systems, a directory of state institution libraries, a list of the location of institutions by public library system, and a copy of the library annual report form are appended. (MES)