As a result of rapid environmental changes, organisations of all types are rethinking their organisational structures in an attempt to provide greater effectiveness and efficiency. A few years ago business process re‐engineering (BPR) was considered the most promising way to restructure an organisation, but has become less popular as shortcomings associated with the process have become evident. Today, greater emphasis is being placed upon modifying the actual organisational structure. Most restructured organisations have moved away from rigid hierarchies to flatter, more flexible structures. Many of the same forces (including increased automation, changing information needs and expectations of users, reduced budgets and the need for staff to have more autonomy over their own work) that have precipitated the reshaping of other organisations have also affected academic libraries. This paper describes some of the factors leading to changes in the organisational structures of academic libraries and provides an overview of trends, excluding convergence, discernible in North America. The paper includes suggestions for steps to be taken to facilitate successful reorganisations, and comments on possible future developments that might radically alter the organisational structures of academic libraries.