The following is a comprehensive list of where to look for grants:

Federal grant opportunities – http://grants.gov/

U.S. Department of Justice (DOJ)
• National Criminal Justice Reference Service (NCJRS) - http://www.ncjrs.org/fedgrant.html
• Office of Justice Programs (OJP) - http://www.ojp.usdoj.gov/funding/
• OJP’s State Administering Agencies List – http://www.ojp.usdoj.gov/state.htm
• Bureau of Justice Assistance (BJA) – http://www.ojp.usdoj.gov/BJA/index.html
• Bureau of Justice Statistics (BJS) – http://www.ojp.usdoj.gov/bjs/funding.htm
• National Institute of Justice (NIJ) - http://www.ojp.usdoj.gov/nij/funding.htm
• Office for Victims of Crime (OVC) – http://www.ojp.usdoj.gov/ovc/fund/dakit.htm
• Office of Juvenile Justice and Delinquency Prevention (OJJDP) – http://www.ojjdp.ncjrs.org/funding/FundingList.asp
• Office of the Comptroller, OJP Financial Guide – http://www.ojp.usdoj.gov/FinGuide
• National Institute of Corrections (NIC) – http://www.nicic.org/WebPage_25.htm
• Office of Community Oriented Policing Services (COPS) – http://www.cops.usdoj.gov/Default.asp?Item=46
• Office on Violence Against Women (OVW) – http://www.usdoj.gov/ovw/currentsolicitations.htm

U.S. Department of Homeland Security (DHS) – http://www.dhs.gov/xgovt/grants/index.shtm
• Office of Grants and Training (G&T) –http://www.ojp.usdoj.gov/odp

U.S. Department of Health and Human Services (HHS)
• Centers for Disease Control and Prevention (CDC) - http://www.cdc.gov/od/pgo/funding/grantmain.htm
• National Institute on Alcohol Abuse and Alcoholism (NIAAA) http://www.niaaa.nih.gov/ResearchInformation/ExtramuralResearch/#NIAAAFunding
• National Institutes of Health (NIH) - (http://www.nih.gov/)
• National Institute on Drug Abuse (NIDA) – http://www.nida.nih.gov/ResFundslist.html

Substance Abuse and Mental Health Services Administration (SAMHSA) - http://www.samhsa.gov/grants/

U.S. Department of Education - http://www.ed.gov/GrantApps/

Corporation for National and Community Service – http://www.cns.gov/whatshot/notices.html

Private sources
• The Foundation Center - http://fdncenter.org/grantmaker/foldermenu.html
• Nonprofit Gateway – http://www.usa.gov/Business/Nonprofit.shtml
• Open Society Institute’s Criminal Justice Initiative – http://www.soros.org/crime/grants.html
• U.S. Catalog of Federal Domestic Assistance (CFDA) – http://www.cfda.gov/
• U.S. List of Parties Excluded from Federal Procurement and Nonprocurement Programs – http://epls.arnet.gov/