Ghost Town USA

Ghost Town · California

Mormon Island

A ghost town of unknown status in Sacramento County, California.

By the Ghost Town USA research team · Last reviewed September 2026

Mormon Island ghost town, California
Photo: Dallas A. (Alexander) Kneass (b. 1817; d. 1891) (Public domain) via Wikimedia Commons

Quick Facts

Status
Unknown Status
Access
Unknown Access
Coordinates
Not recorded

The map remembers Mormon Island long after the crowds moved on. Mormon Island was a mining town mainly populated by Mormon immigrants seeking gold in the American River during the California Gold Rush.

Sacramento County holds 4 documented ghost towns, including Hoboken, Norristown, Prairie City — Mormon Island keeps them company on the map.

The story of Mormon Island

California wrote the book on ghost towns, from Gold Rush tent cities to Owens Valley farm towns the aqueduct dried up.

Mormon Island was a mining town mainly populated by Mormon immigrants seeking gold in the American River during the California Gold Rush. Its site is now submerged under Folsom Lake in present-day Sacramento County, California, United States.

What you'll find today

The on-the-ground condition of Mormon Island is unverified — it's listed here with unknown status. That could mean standing buildings, or an empty field. Go prepared for either, and consider sharing what you find so the record improves.

Nobody has confirmed the access situation, so treat any visit as reconnaissance: verify land ownership first, and be ready to admire from the road.

Getting there

Here's the honest truth: access to Mormon Island is unverified. We couldn't confirm whether the site sits on public land, private property, or something in between — so verify land ownership and local rules before visiting, and respect private property at all times.

Good to know

Ghost-town etiquette is simple: take only photographs. Removing artifacts is illegal on public lands and disrespectful everywhere else — and on federal land it can be a serious offense.

Mormon Island FAQs

Where is Mormon Island located?
Mormon Island is in Sacramento County, California. Precise coordinates aren't on record, so research maps and local directions before you go.
What county is Mormon Island in?
Mormon Island sits in Sacramento County, California. See our full guide to ghost towns in Sacramento County for its neighbors.
What is the history of Mormon Island?
Mormon Island was a mining town mainly populated by Mormon immigrants seeking gold in the American River during the California Gold Rush. Its site is now submerged under Folsom Lake in present-day Sacramento County, California, United States.
What remains at Mormon Island today?
The on-the-ground condition of Mormon Island is unverified — it's listed here with unknown status. That could mean standing buildings, or an empty field. Go prepared for either, and consider sharing what you find so the record improves.
Can you visit Mormon Island?
Here's the honest truth: access to Mormon Island is unverified. We couldn't confirm whether the site sits on public land, private property, or something in between — so verify land ownership and local rules before visiting, and respect private property at all times.

Sources: description based on Wikipedia (“Mormon Island, California”), CC BY-SA.

More Ghost Towns in Sacramento County

See all 4 ghost towns in Sacramento County, California