Collections include the Cowboys Then & Now Collection, The Livery Station, Pioneer Cabin, General Store, the Nature Room, Native American History, and much more. One building focuses on Agriculture, Transportation & Timber, and the businesses that served those industries.

A large photo archive (most are digitized), collection of high school annuals, newspapers, and an extensive library make the museum popular with people exploring their family history in Union County, Oregon.

The Traveling Trunk is an educational presentation, created by former teachers and adapted to the age level of the groups to which it is presented, off-site.

A brick historic bank building houses a large portion of the exhibits. An attached former grocery store and one-time roller skating rink houses the Cowboys Then & Now Collection and General Store and storage area and archives. The A T & T building is a u-shaped single story building with a courtyard. It contains the Livery Station and Blacksmith Shop on one wing, along with a space for rotating and guest exhibits. The other wing houses the AT & T exhibits, Forest Service Fire Lookout, Post office and trade exhibits. An early city firetruck is also housed in this wing. A restored historic white church across the street from the museum is owned by the UCM Society and is a venue for museum events and is available for rent for weddings, reunions and craft shows. It has a small stage for entertainment and lectures.

The Union County Museum is governed by a ten to twelve member board of directors, including an appointed curator. All board directors, officers and the curator are volunteer, at this time.

Access: General Public, Students, Scholars, Members

Appointment required: True

A restored historic white church across the street from the museum is owned by the UCM Society and is a venue for museum events and is available for rent for weddings, reunions and craft shows. It has a small stage for entertainment and lectures.