Jacob Kielland (26 July 1841 – 19 June 1915) was a Norwegian priest and politician.
He was born in Stavanger to Jens Zetlitz Kielland (1816–1881) and his wife Christine (1820–1862), née Lange.
His oldest sister Kitty became a painter, his oldest brother Alexander became a highly successful novelist and his youngest living brother Tycho became the owner of the Norwegian News Agency.
Their oldest son Jens Zetlitz Monrad Kielland became a notable architect and professor.
He worked as a teacher in his native Stavanger; in 1873 he was school inspector in addition to sexton.