Although the state censuses of New York are not indexed by name, it is fairly easy to find an individual in the enumerations for New York City if the address of residence is known. The book compiled by the Family History Library is an index to addresses for the Manhattan 1915 census. Prior to 1914, the Bronx was part of New York County and the Bronx is included in the Manhattan 1905 census and index. The Bronx was enumerated in 1915, but was not indexed by this card index. Addresses can usually be obtained from city directories.
Most city directories for New York City are available on microfilm.
Manhattan directories for this time period also include Bronx addresses. Once you have addresses, then select one of the street address indexes. Queens, New York, State Census Index Cards are indexed alphabetically by street name, without regard to directional prefix. Instruction cards have book numbers and other notes about how the census was taken. To access the 1915 Queens census find the street on the index.