Hours and Admission

Regular Building Hours

Please take note of upcoming closures below.

Exhibition galleries

Monday, and Wednesday through Friday, from 9:30 AM to 4:45 PM
Tuesday from 9:30 AM to 7:45 PM (galleries open at 12:00 PM the second Tuesday of the month)
Saturday from 10:00 AM to 3:00 PM

Please note that the last admission for exhibition visitors will be 45 minutes prior to closing.

Library

Monday, and Wednesday through Friday, from 9:30 AM to 4:45 PM
Tuesday from 9:30 AM to 7:45 PM (the library opens at 12:00 PM the second Tuesday of the month)
Saturday from 10:00 AM to 3:00 PM

Staff retrieves materials up to 45 minutes before the library closes. Reading room closes 15 minutes before the library.

An advance appointment is strongly encouraged for all researchers. Please log-in to your Portal1791 account to select your preferred visit dates.

Upcoming Closures

• The library closes early at 4:00PM on Thursday, 7 May.
• The Library is closed on Tuesday, 12 May.
• The MHS is closed Saturday, 23 May through Monday, 25 May, for Memorial Day Weekend.
• The Library closes early at 1:00PM on Monday, 8 June, for a staff event. 
• The Library closes early at 2:00PM on Thursday, June 11.
• The MHS is closed Friday, 19 June, in observance of Juneteenth.
• The exhibition galleries close at 5:00PM on Tuesday, June 30.
• The MHS is closed Saturday, 4 July, through Monday, 6 July, in observance of Independence Day.
• The MHS is closed Saturday, 5 September through Monday, 7 September, for Labor Day Weekend.
• The Library is closed on Friday, 18 September 2026, for a conference.
• The Library is closed on Monday, 12 October, in observance of Columbus Day / Indigenous Peoples' Day.
• The Library closes early at 2:00PM on Thursday, 15 October.
• The MHS is closed on Wednesday, 11 November, in observance of Veteran's Day. 
• The MHS is closed Thursday, 26 November through Saturday, 28 November, for Thanksgiving Weekend. 
• The Library is closed Thursday, 17 December through Wednesday, 23 December.
• The MHS is closed Thursday, 24 December through Saturday, 2 January.

Admission

The MHS is free and open to the public. All ages are welcome in the galleries; library readers must be at least 16 years of age or accompanied by an adult.

The MHS is located in a Nationally Registered Landmark building. It is equipped with a wheelchair ramp, interior ramps, and elevator that allow visitors with mobility impairments access to our reading room, exhibition galleries, and other public meeting spaces.