Purchasing Associations

NIGP: The Institute for Public Procurement

Capitol Area Purchasing Association Chapter of NIGP

Delaware Public Purchasing Association

Maryland Public Purchasing Association

Metropolitan Washington DC Chapter of NIGP

Virginia Association of Governmental Purchasing

NIGP Chapter Web Sites


Commonwealth of Pennsylvania

Pennsylvania Department of General Services

Pennsylvania e-Marketplace Contract Search

Pennsylvania General Assembly


COSTARS Contract Search

National City Government Resource Center

State and Local Governments on the Net

Cooperative Purchasing Programs

H-GAC Cooperative Purchasing Program

Keystone Purchasing Network (KPN)

National Cooperative Purchasing Alliance (NCPA)

National Intergovernmental Purchasing Alliance (National IPA)

National Joint Powers Alliance (NJPA)

Pennsylvania Education Purchasing Program (PEPPM) Technology Bidding and Purchasing Program

Public Sourcing Solutions

The Cooperative Purchasing Network (TCPN)

U.S. Communities

Western States Contracting Alliance (WSCA)

* Please note that the above is a small listing of the available cooperative contracts. It is up to each agency to determine whether or not they are able to use any of the listed cooperative contracts.

Other Purchasing Sites 

NASPO National Association of State Procurement Officials

ISM Institute for Supply Management

NCMA National Contract Management Association

NACo National Association of Counties

General Reference

Thomas Register

The Blue Book


Dunn & Bradstreet

Zip Code Information

ANSI American National Standards Institute

Florida Atlantic University (FAU) Public Procurement Research Center

Better Business Bureau