More than three-quarters of Evanston residents who used their library cards in the past year used them only at the main library downtown.
A library usage report, released by city officials late this afternoon, also shows that just under 10 percent of Evanston residents actually used a library card in the past year.
Ten percent of card users patronized only the North Branch and another 3 percent went to both the North Branch and the main library.
Seven percent of card users patronized only the South Branch and another three percent used both the South Branch and the main library.
The data does not track users at any of the branches who enter the building but don’t use their card to check out materials.
A chart from the city report showing library usage by census tract. The yellow mostly “pacman” shaped segments represent the share of cardholders in a tract using only the main library.
City Manager Wally Bobkiewicz has proposed shutting the branch libraries as an economy measure, and the level of branch usage in different neighborhoods is likely to be a key factor in determining what areas would be subject to a special service area tax if the City Council adopts that strategy as a way to save the branches.
The full report is available online.