It is situated in the district of Saarbrücken, which is part of the federal state of Saarland.

The village lies in the urban area of Saarbrücken, 5 km south of Großrosseln and close to the frontier with France (near the department of Moselle in Lorraine).

The town is the ancestral home of the family of American president Dwight D. Eisenhower.

The Eisenhauer (German for "iron hewer/miner") family migrated from Karlsbrunn to North America in 1741, first settling in York, Pennsylvania.

President Eisenhower's Pennsylvania Dutch ancestors, who were primarily farmers, included Hans Nikolaus Eisenhauer of Karlsbrunn, who migrated to Lancaster, Pennsylvania, in 1741.