If you know of other relevant sites or would like to set up an Optimum Population Trust group in your country, please send an email to info@optimumpopulation.org

International Organisation for Migration

http://www.iom.int/jahia/jsp/index.jsp

International Planned Parenthood Federation (IPPF)

http://www.ippf.org/en/

Population Council

http://www.popcouncil.org/

United Nations Population Division (UNPD)

http://www.un.org/esa/population/unpop.htm

United Nations Population Fund (UNFPA)

http://www.unfpa.org

United Nations Population Information Network

http://www.un.org/popin/

Climate Ark

http://www.climateark.org/

UK (EU): All Party Parliamentary Group on Population, Development and Reproductive Health

http://www.appg-popdevrh.org.uk/

UK (EU): British Society for Population Studies

http://www.lse.ac.uk/collections/BSPS/

UK (EU): Brook Advisory

http://www.brook.org.uk/content/M1_gotobrook.asp

UK (EU): The Campaign for Political Ecology

http://www.eco.gn.apc.org/

UK (EU): Centre for Population Studies at LSHTM

http://www.lshtm.ac.uk/cps/

UK (EU): Centre on Migration, Policy and Society

http://www.compas.ox.ac.uk/

UK (EU): Family Planning Association

http://www.fpa.org.uk/

UK (EU): Interact Worldwide

http://www.interactworldwide.org/

UK (EU): Jack Parson?s Archive

http://www.jackparsonsarchive.org/

UK (EU): Marie Stopes International

http://www.mariestopes.org.uk/

UK (EU): Migrationwatch UK

http://www.migrationwatchuk.com/

UK (EU): Optimum Population Trust

http://www.optimumpopulation.org/

UK (EU): Office for National Statistics (ONS)

http://www.statistics.gov.uk/CCI/nugget.asp?ID=6

UK (EU: ONS: Government Actuary?s Department

http://www.gad.gov.uk/Demography%5FData/

UK (EU): People and the Planet

http://www.peopleandplanet.net/

UK (EU): Population and Sustainability Network

http://www.populationandsustainability.org/

UK (EU) Teenage Pregnancy Unit

http://www.everychildmatters.gov.uk/teenagepregnancy/

UK (EU) ourfutureplanet.org

http://www.ourfutureplanet.org/

European Society of Contraception

http://www.contraception-esc.com/

Austria: International Institute for Applied Systems Analysis

http://www.iiasa.ac.at/Research/POP/network/index.html?sb=26

Austria: International Centre for Migration Policy Development

http://www.icmpd.org/

Austria: Vienna Institute of Demography

http://www.oeaw.ac.at/vid/index.html

Belgium (EU): AIDEP

http://www.uclouvain.be/aidep.html

Czech Republic (EU): Charles University, Dept of Demography

http://boris.natur.cuni.cz/kdgd/

Denmark (EU): Academy for Migration Studies

http://www.amid.dk/

Finland (EU): University of Helsinki, Population Research Unit

http://blogs.helsinki.fi/populationru/

France (EU): Committee for International Cooperation in National Research in Demography

http://www.cicred.org/

France (EU): International Union for the Scientific Study of Populations

http://www.iussp.org/

France (EU): D?ographie Responsable

http://www.demographie-responsable.org/

France (EU): Institute National d?Etudes Demographiques

http://www.ined.fr/en/homepage_of_ined_website/

Germany (EU): Deutsche Stiftung Weltbevolkerung

http://www.weltbevoelkerung.de/en/

Germany EU: Max Planck Institute for Demographic Research

http://www.demogr.mpg.de/

Greece (EU): Universtity of Thessaly, Dept. of Planning and Regional Development

http://www.prd.uth.gr/en/

Italy (EU): Rientrodolce

http://www.rientrodolce.org

Netherlands (EU):Club of Ten Million

http://www.overbevolking.nl

Netherlands (EU): Netherlands Interdisciplinary Demographic Institute

http://www.nidi.knaw.nl/en/

Norway: University of Oslo

http://folk.uio.no/okravdal/

Poland (EU): Institute of Demography

http://www.sgh.waw.pl/instytuty/isd/

Spain (EU): Demographic Studies Centre

http://www.ced.uab.es/

Sweden (EU): Centre for Population Studies

http://www.ddb.umu.se/cbs/indexeng.html

Netherlands (EU): Eco-Pop

http://www.ecopop.ch/index.htm

Switzerland: World Demographic Association

http://www.wdassociation.org/

Japan: JOICFP

http://www.joicfp.or.jp/eng/

Japan: NPO 2050

http://www.npo2050-e.org/

Korea: Korea Institute for Health and Social Affairs

http://www.kihasa.re.kr/html/jsp/

Canada: CIED

http://www.cied.umontreal.ca/index_EN.html

Canada: Action Canada for Population and Development

http://www.acpd.ca/acpd.cfm/en/section/Home

Mexico CEDDU

http://www.colmex.mx/centros/ceddu/

USA: Alan Guttmacher Institute

http://www.guttmacher.org/

USA: Association for Population/ Family Planning Libraries and Information Centers - International

http://www.aplici.org/

USA: Census Bureau? International Programs Centre

http://www.census.gov/ipc/www/

USA: Center for the Advancement of the Steady State Economy

http://www.steadystate.org/

USA: Center for Development and Population Studies

http://www.cedpa.org/

USA: Center for Environment and Population

http://www.cepnet.org/

USA: Center for Immigration Studies

http://www.cis.org/

USA: Center for Reproductive Rights

http://www.reproductiverights.org/

USA: CIA World Fact Book - Fertility

https://www.cia.gov/library/publications/the-world-factbook/rankorder/2127rank.html

USA: Comprehensive US Sustainable Population

http://www.uscongress-enviroscore.org/cuspframes.html

USA: Control Growth

http://www.controlgrowth.org/

USA: Demographic and Health Surveys

http://www.measuredhs.com/

USA: Die Off

http://www.dieoff.org/

USA: Earth Policy Institute

http://www.earth-policy.org/

USA: Global Footprint Network

http://www.footprintnetwork.org/

USA: HowMany.org a project of the Institute for Population Studies

http://www.howmany.org/

USA: The Institute for Population Studies

http://www.ifpops.org/

USA: Negative Population Growth

http://www.npg.org/

USA: Pathfinder International

http://www.pathfind.org/site/PageServer

USA: Population2005.org

http://www.population2005.org/

USA:Population Action International

http://www.populationaction.org/

USA: Population Association of America

http://www.popassoc.org/i4a/pages/index.cfm?pageid=1

USA: Population Connection

http://www.populationconnection.org/

USA: Population- Environment Research Network (International programme, IUSSP)

http://www.populationenvironmentresearch.org/

USA: Population-Environment Reference Web Site

http://pop-env.berkeley.edu/

USA: Population Index

http://popindex.princeton.edu/

USA: The Population Institute

http://www.populationinstitute.org/

USA: Population Media Centre

http://www.populationmedia.org/

USA: Population Reference Bureau

http://www.prb.org/

USA: Population Research Institute

http://athens.pop.psu.edu/allen/LinksByCat.cfm?SubjectID=6

USA: Population Resource Center

http://www.prcdc.org/

USA: Population Review

http://www.populationreview.com/

USA: Population Services International

http://www.psi.org/about_us/

USA: World Population Awareness

http://www.overpopulation.org/

USA: World Population Fund

http://www.wpf.org/

USA: Worldwatch Institute

http://www.worldwatch.org/

Australia: Sustainable Population Australia

http://www.population.org.au/

New Zealand: Population Studies Centre

http://calendar.waikato.ac.nz/researchcentres/population.html