Østre Porsgrunn Church (full name: Jesu Kirke i Østre Porsgrunn, also called Østsiden Church) was a church in the Rococo style built in 1760 and located in the city of Porsgrunn in Vestfold og Telemark, Norway. In 2011 the building was completely destroyed by a fire. The church was built in the Kirkehaugen district of Eastern Porsgrunn. The church site is located on Kirkebakken 17, just east of Fylkesvei 356.