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Oneill

Ghost town · Custer County, Montana

Pennock Creek quadrangle, USGS topographic map (1969, 1:24,000)
Pennock Creek quadrangle, USGS topographic map (1969, 1:24,000) · U.S. Geological Survey, Historical Topographic Map Collection · Public domain

Oneill is a ghost town in Custer County, Montana. It is one of 8 former communities in Custer County on the federal names register. That ranks the county 23rd among the 55 Montana counties with a vanished settlement on record.

The U.S. Geological Survey lists Oneill as a historical populated place on the Pennock Creek topographic quadrangle: the name is no longer in official use for a community, whether the settlement was abandoned, absorbed into a neighbouring town or renamed. The recorded location is 46.1486° N, 105.1505° W.

Key facts

USGS quadranglePennock Creek
Elevation2,571 ft
Nearest living townIsmay, MT
Distance to it29.7 miles
GNIS feature ID1716869
Coordinates46.14861, -105.15053

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What's there now

Oneill is no longer a community in its own right. The nearest living town is Ismay, MT (population 1), about 29.7 miles away in a straight line, and the site sits at roughly 2,571 feet above sea level. Much of the land around former townsites is private; check access before you visit.

Nearby places

Questions

Where is Oneill?

Oneill is in Custer County, Montana, at 46.1486, -105.1505.

How many ghost towns are in Custer County?

Custer County, Montana has 8 ghost towns on record at Wayfarrow.

Sources and licences

Facts marked "approximately" carry an uncertain date in the source. Text on this page is generated from the sources above; no encyclopedia prose is copied. Last updated 2026-11-05.