If the plans are implemented in full it would double the number of settlers in the West Bank outside east Jerusalem, according to the Peace Now website.
Israeli officials said the plans referred to potential construction and only a small number had been approved.
Continued settlement work is seen as a major barrier to Palestinian statehood.
Correspondents say the information indicates Israel's next coalition government, currently in the process of being formed by Likud leader Benjamin Netanyahu, has a wide choice of projects for settlement expansion.
If coalition negotiations force him into a strongly pro-settlement right-wing government, the plans could put him in collision course with the new US government, they add.
The Palestinian Authority, which has been engaged in a revived negotiated process since November 2007, has warned Israel that it must choose between peace and settlements, but it cannot have both.
"The completion of these projects will make the plan of creating a Palestinian state next to Israel totally unrealistic," Peace Now head Yariv Oppenheimer said in a radio interview.
Housing ministry spokesman Eran Sidis insisted in an interview with the AFP news agency that the plans "refer only to potential construction" and "in practice only a very small part of these urbanism projects are implemented".
All Jewish settlements in the Palestinian territory are regarded as illegal under international law, although Israel disputes this.
More than 400,000 Jewish settlers live in the West Bank and East Jerusalem, areas which were captured by Israeli in the 1967 war.