| Pornainen | |
| Official Name: | Finnish: Pornaisten kunta Swedish: Borgnäs kommun |
| Other Name: | Borgnäs |
| Settlement Type: | Municipality |
| Coordinates: | 60.475°N 47.5°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Finland |
| Subdivision Type1: | Region |
| Subdivision Name1: | Uusimaa |
| Subdivision Type2: | Sub-region |
| Subdivision Name2: | Helsinki sub-region |
| Subdivision Type3: | Metropolitan area |
| Subdivision Name3: | Helsinki metropolitan area |
| Seat: | Kirveskoski |
| Leader Title: | Municipal manager |
| Leader Name: | Hannu Haukkasalo |
| Established Title: | Charter |
| Established Date: | 1869 |
| Blank3 Name: | Climate |
| Blank3 Info: | Dfb |
| Timezone: | EET |
| Utc Offset: | +02:00 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +03:00 |
Pornainen (pronounced as /fi/; sv|Borgnäs) is a small municipality of Finland. It is located in the province of Southern Finland and is part of the Uusimaa region. The neighboring municipalities are Askola in the east, Mäntsälä in the north, Porvoo in the southeast and Sipoo in the southwest. It is located east of the town of Järvenpää.
The municipality has a population of and covers an area of NaNPornainen}} of which NaNPornainen}} is water. The administrative centre of municipality is Kirveskoski (about 2,000 residents), also known as Pornainen's church village, and second largest village is Halkia (about 500 residents). The population density is NaNPornainen.
Movies and scenes for TV productions and short films have been filmed in Pornainen from the 1930s to the present day. In the publications of film industry, Pornainen was once named the most photographed locality in Finland, that is why the municipality has marketed itself under the nickname "Hollywood of Finland".[1] [2] The village of Laukkoski is known as a summer destination for many former celebrities, such as actress Regina Linnanheimo, and writers Mika Waltari and Juhani Aho.[1] [3]
The municipality is unilingually Finnish.
Results of the 2011 Finnish parliamentary election in Pornainen: