In this document, he donated 23 Stader Scheffel of winter wheat from Horst to the newly founded monastery.

It wasn't until the Prussian administrative reforms starting in 1867 that the village became an independent municipality in the Steinburg district, no longer under the control of the Uetersen monastery.

The total area of the municipality is relatively large, almost 3000 hectares, allowing for the settlement of over 100 farming positions, including 14 full-holders, 16 half-holders, and over 70 smallholders (Kätner) with land ownership.

These housed day laborers, traders, and craftsmen, leading to a population increase to over 2000 by 1850, making Horst the fourth largest settlement in the Steinburg region after Itzehoe, Glückstadt, and Wilster at the time.

The connection to the Hamburg-Altona-Kiel railway line in 1844 by the Altona-Kieler Eisenbahn-Gesellschaft also contributed to population growth and the establishment of new commercial and trade enterprises.

Following World War II, the population nearly doubled due to the influx of refugees and displaced persons, from approximately 2600 inhabitants in 1939 to initially over 5000 in 1950, stabilizing around 4000 in the 1960s.

"[2] The largest club in the community is the MTV Horst, which offers activities such as faustball, handball, athletics, and table tennis.