American Land Rights Association 
A grassroots, non-profit private property rights/multiple-use advocacy organization.
http://www.landrights.org/Property Rights Research
A coalition of US land and natural resource owners. Tracks coverage of the property rights issue.
http://www.propertyrightsresearch.org/
Property Rights Foundation of America
An advocacy group for private property rights. Political research, action alerts and analysis.
http://www.prfamerica.org/
Kitsap Alliance of Property Owners
A property owners group in Kitsap County, Washington, opposing unreasonable government regulation of private property.
http://www.kitsapalliance.org/
Coalition for Property Rights (CPR)
A grassroots organization made up of citizens concerned about the erosion of property rights in the US. Has a particular emphasis on Florida.
http://www.proprights.com/
Liberty Matters
Established by three regional property rights organizations to advance the grassroots property rights movement in America; works closely with conservative and libertarian think tanks.
http://www.libertymatters.org/
The National Association of Reversionary Property Owners (NARPO)
Opposes rail to trail conversions, with emphasis on cases in Kansas.
http://home.earthlink.net/~dick156/
International Union of Property Owners (UIPI)
The International Union defending private real estate property rights worldwide, with members from more than 20 European countries, established in 1923.
http://uipi.com
Texas Landowner's Council
Information for protecting land owners rights in the state of Texas.
http://www.texaslandownerscouncil.com
