National Historic Register properties in Longmont, Colorado

• Callahan, T. M., House
• Dickens Opera House
• Downtown Longmont Historic District
• East Side Historic District
• Empson Cannery
• Hoverhome and Hover Farmstead
• Longmont Carnegie Library
• Longmont College
• Longmont Fire Department
• Sandstone Ranch
• St. Stephen's Episcopal Church, 1881
• Tower of Compassion
• West Side Historic District