In 1806, Friedrich Albert, the son of Christian Heinrich, lost his official power as a sovereign due to the establishment of the Rhine Alliance.

In 1845, the Rhine local code was released, leading to the first municipal council elections in Nümbrecht and Marienberghausen.

In 1933, the government fell into the hands of members of the NSDAP, and anxiety and arbitrariness dominated Nümbrecht for 12 years.

In 1969, the current community of Nümbrecht was formed with the implementation of the "Law about the Reorganization of the Oberbergischer Kreis".

In 1973, Nümbrecht received national recognition as an air spa from the Minister of Work, Health, and Social Duties.

In 2003, Nümbrecht became the first local authority district in North Rhine-Westphalia to receive the environmental brand "Viabono," which signifies environment-friendly tourism.

It bears a striking resemblance to the coat of arms of the Homburg Estate, which was owned by the Counts of Sayn-Wittgenstein-Berleburg.

The Homburg is located within the municipality, and above the left tower, the coat of arms displays the emblem of the Counts themselves.

The 30-metre high watchtower at the "Lindchen" in Nümbrecht has 154 steps; the top of the tower is 371 metres above sea level.

The Amiger tunnel is situated in a forest area called "In the Goldkaule", below the "Alfred Lang" hut and the watchtower.

The conversion of Benroth into an "ecological village of the future" required some measures, such as the installation of a moist biotope and drystone-wallings.

Near Nümbrecht, small quartzite monadnocks from the Devonian period (approximately 360 million years ago) were exposed by the erosion of softer sedimentary rock.

The building was changed and reconstructed several times and thus lost its original appearance of a typical fortified church.

In both 1969 and 1991, Marienberghausen won the German federal competition "Unser Dorf soll schöner werden" ("Our village shall become more beautiful").

The "Oberbergische Postkutsche", a mail coach, runs between Nümbrecht and Wiehl every Friday, Saturday and Sunday from May to the end of October.

Berlin citizens could spend a free vacation in Nümbrecht, as promoted by the county of North Rhine-Westphalia.

The biggest employer in municipality is the SARSTEDT Verwaltungs AG with factories in the villages of Rommelsdorf and Winterborn.

Similarly, the KABE LABORTECHNIK GmbH in Elsenroth is a bigger medical technology company, founded in 1983.