MyApartmentMap is a housing search web site with pet friendly listings all over the USA. Katie Reardon created this web site after searching for an apartment that would accept her Jack Russell Daisy, and her Beagle Jerry. As a pet owner she found it difficult to find pet friendly apartments, and wanted to help other pet owners find a home quick and easy.
Apartments listings all over the US and you can search on pet friendly listings.
Zillow.com and Hotpads.com both allow you to select Pet Friendly rental housing in their filters.
FidoFriendly.com is a wonderful resource for pet friendly travelers. Looking for a pet friendly hotel or off leash beach where you are visiting. They can help.