Thursday's decision is the first of its kind made by the Swedish Public Health Agency.
Previous visit bans issued by the municipalities on their own have lacked legal support, for example the City of Stockholm's decision which was overturned by a court.
Half of the county's municipalities are affected
The municipalities in Stockholm County that are on the list are Botkyrka, Danderyd, Ekerö, Järfälla, Salem, Sollentuna, Solna, Stockholm, Södertälje, Täby, Upplands Väsby, Vallentuna, Österåker.
- But we still see this as a last resort when everything else has been tried to prevent the spread of infection, said state epidemiologist Anders Tegnell at the Swedish Public Health Agency's press conference on Thursday.
The municipalities on the list have thus shown to FHM that they have taken the necessary measures to prevent the spread of the virus - but it has not been enough.
"Good that we now have a solution"
The decision applies from 3 to 12 December, but exceptions may be made.
- It is good that we now have a solution that is legally sustainable and also applies to private housing.
Given the social consequences and the great encroachment on people's lives, stopping the visit means that it is welcome that the ban also includes exceptions to break a separation between spouses or if there are other special circumstances, says Stockholm City's senior citizens' councilor Erik Slottner (KD).