Geilenkirchen (German pronunciation: [ˈɡaɪlənkɪʁçn̩] ⓘ, Ripuarian: Jellekerke [ˈjæləˌkæʀ˦(ə)kə]) is a town in the district Heinsberg, in North Rhine-Westphalia, Germany.

It is situated near the border with the Netherlands, on the river Wurm, approx.

The town gives its name to nearby NATO Air Base Geilenkirchen.

The base is home to seventeen E-3A airborne early warning and control aircraft flown by aircrew from over fourteen nations.

On 24 July 2019 the highest temperature ever recorded in Germany was measured in Geilenkirchen at 40.5 °C (104.9 °F) during a heat wave that affected much of Europe.