This study assessed the supervisory styles in special collections in federal and state university libraries in Nigeria. Descriptive survey design was adopted with purposive sampling to obtain a sample of 178 librarians and library officers in 12 federal and state university libraries in Nigeria. A questionnaire was used in the collection of data. Mean scores and standard deviation were used to answer the research questions. The findings showed that approaches to supervision include routine checks of subordinates, periodic evaluation of stock, regular meeting with staff, reprimanding of erring staff, and a liberal supervisory style.