Located just over a mile (about 2 km) west of the Washington–Idaho border, Liberty Lake is both a suburb of Spokane, Washington and a bedroom community to Coeur d'Alene, Idaho.

According to the United States Census Bureau, the city has a total area of 6.14 square miles (15.90 km2), all of it land.

At Molter the border shifts south to Interstate-90, which it follows to within a mile of the Idaho state line.

Sprague Avenue marks the southern portion of the city limits in the east to Liberty Lake Road, from which it zig-zags west to Appleway Road at Hodges.

The lake itself is located outside of the city limits about three blocks south of Sprague.

Areas east of Liberty Lake Road and areas north of Appleway Road lie on the relatively flat land along the floor of the Spokane Valley.

The areas west of Liberty Lake Road and south of Appleway Road show far more topographical relief, rising from around 2,100 feet to over 2,600 feet on Carlson Hill.

While Mica Peak, which rises beyond the southern shore of the lake, climbs to nearly 5,200 feet.

There were 3,344 housing units at an average density of 544.6 per square mile (210.3/km2).

[14] The Liberty Lake Splash, a free community-oriented weekly newspaper is distributed in the city and in the Spokane Valley; the paper has a circulation of about 6,000 copies per week.