St. Louis Mercantile Library

Plan Your Visit



The reading room for rare books and archival materials is open from 12:30 to 4:00 p.m. on Mondays and 9:00 a.m. to 4:00 p.m. Tuesday through Thursday.  The rest of the Mercantile Library, including the exhibitions, are available during all open hours of the Thomas Jefferson Library building. Normal semester hours are Monday - Thurday 7:30 am - 10:30 p.m.; Friday 7:30 a.m. - 5:00 p.m.; Saturday 8:00 a.m. to 4:00 p.m.; Sunday 12:00 p.m. to 8:00 p.m. Please note that hours vary with semester. Check current Library  hours or by phone to 314-516-7240.


The Mercantile Library is located in the Thomas Jefferson Library building on the UMSL North Campus, easily accessible from highway 70 via Natural Bridge Road or Florissant Road and by Metrolink. Get driving directions here or Metrolink directions here.


Get more out of your Library visit with a docent-led tour. No reservations are necessary for free public tours given on Saturdays at 11:00 a.m. and Sundays at 2:00 p.m. Free group tours can also be arranged for other times; please call Rebecca Thorn at 314-516-7281 or email (

*Please Note: Weekend tours may not available during semester breaks. Please check our hours page or phone 314-516-7240 to verify tour availability prior to your visit.

Mercantile Library Atrium