However, no candidate from the national parties filed the papers.
Two candidates filed their nomination from the Mandi seat and one from Shimla.
The filing of nominations will continue till April 29, election officials said.
The papers will be scrutinised on April 30. The last date of withdrawal of candidature is May 2, an official told IANS.
The four constituencies have a total of 50,96,869 electors, including 25,84,183 men, 25,12,627 women and 59 third gender.
There are 133,083 first-time voters but the number may increase further by April 29, when the Election Commission clears 182,890 new applications.
In 2009, the BJP, which was then in power in the state, won three of the four Lok Sabha seats.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)