| Hörnerkirchen | |
| Native Name Lang: | de |
| Settlement Type: | Amt |
| Subdivision Type: | Country |
| Subdivision Name: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Schleswig-Holstein |
| Subdivision Type3: | District |
| Subdivision Name3: | Pinneberg |
| Seat Type: | Region seat |
| Seat: | Brande-Hörnerkirchen |
| Leader Title: | Amtsvorsteher |
| Leader Name: | Bernd Reimers (CDU) |
| Area Total Km2: | 44,91 |
| Population Total: | 4014 |
| Population As Of: | 2020-12-31 |
| Website: | www.amt-hoernerkirchen.de |
Hörnerkirchen is an Amt ("collective municipality") in the district of Pinneberg, in Schleswig-Holstein, Germany. It is situated approximately 12 km northeast of Elmshorn. The seat of the Amt is in Brande-Hörnerkirchen.
The Amt ("collective municipality") Hörnerkirchen consists of the following municipalities (population in 2005 between brackets):