Part of East County, our guide to El Cajon, La Mesa, Santee, Lakeside and Alpine.
The Knox House Museum, at 280 N. Magnolia Avenue in El Cajon, is run by the El Cajon Historical Society. Admission is free. Its page says it is normally open the first and third Saturdays from 11 a.m. to 2 p.m., closed in August, with a note dated January 2023. Call 619-444-3800 first.Checked October 23, 2026.
FreeAdmission
1st, 3rd Sat11 a.m. to 2 p.m.
AugClosed
CallAhead for Docents
Address280 N. Magnolia Avenue, El Cajon, CA 92020. Phone 619-444-3800.
Hours“As of January 2023, the Museum is normally open the first and third Saturdays of the month, from 11:00AM until 2:00PM (The museum is closed in August). Please call ahead (619.444.3800) to ensure Docents are available!”
Admission“Admission is free. Memberships and donations welcomed.”
What It IsThe historic house museum of the El Cajon Historical Society, in the home built by an early El Cajon valley settler.
What We Could Not Verify
- Whether the first and third Saturday hours are current for fall 2026: the hours note is dated January 2023 and the page still shows a 2025 members’ meeting.
- Holiday events: none confirmed.
- Map point is approximate (OpenStreetMap), not a surveyed entrance.
More in East County
FAQ
When is the Knox House Museum open?
Its own page says normally the first and third Saturdays of the month, 11 a.m. to 2 p.m., closed in August, as of January 2023. Call ahead to be sure.
Sources
Checked October 23, 2026 by It’s San Diego. Cite this page: It’s San Diego (itssandiego.com), checked October 23, 2026. Free to quote with a link to this page; tables are licensed CC BY 4.0.