Wikipedia: Polk County, Iowa
- Encyclopedia article covers geography, demographics and links to localities. Includes maps and courthouse photograph.
- http://en.wikipedia.org/wiki/Polk_County,_Iowa

Metro Waste Authority
- Manages all the solid waste generated within the Polk County area. Includes landfill, household hazardous waste facility, transfer station and residential recycling programs.
- http://www.mwatoday.com/residential.html

Polk County Fire Chiefs Association
- Works to promote excellence in fire-EMS leadership, shared training opportunities, cooperative operations and joint economic ventures. Includes meeting schedule, policies, teams and training information.
- http://www.pcfca.com/

City-Data.com: Polk County, Iowa
- Profiles population demographics, jobs, housing, agriculture and crime statistics. Contains a list of recreational areas, churches, cemeteries, post offices, charts, graphs and maps.
- http://www.city-data.com/county/Polk_County-IA.html

Polk County, Iowa - US Census Bureau
- Provides population, demographic, and housing information.
- http://quickfacts.census.gov/qfd/states/19/19153.html

Eastern Regional Polk County
- Nonprofit regional economic development organization whose mission is to attract new businesses to the area and retain and grow existing ones. Formed by the communities of Altoona, Bondurant, Mitchellville and Pleasant Hill.
- http://www.iowa-property.com/

Polk County Assessor
- Appraises all property for tax purposes fairly and equitably by state law. Includes database search, data to download, forms, FAQs and maps. Located in Des Moines.
- http://www.assess.co.polk.ia.us/

Polk Soil and Water Conservation District
- Provides information about programs, watershed projects, staff profiles, photographs and urban conservation. Located in Ankeny.
- http://polk-swcd.org/

Des Moines Area Regional Transit Authority
- Serving Greater Des Moines, Clive, Urbandale, Windsor Heights, Ankeny and Altoona. Includes schedules and routes, information about programs and employment.
- http://www.ridedart.com/

Keyboard West Studios
- Piano, guitar and voice instruction for all ages, in a partner/group format. Includes curriculum, class schedule, and job openings. Locations in Clive and West Des Moines.
- http://www.keyboardwest.com/

Iowa State University Extension - Polk County
- Offers agricultural, business, family and 4-H programs and resources. Includes staff directory, news, events, hours and directions. Located in Des Moines.
- http://www.extension.iastate.edu/polk/

Polk County, Iowa
- Official county government site. Includes information about offices and departments, profiles of elected officials, services and things to do.
- http://www.polkcountyiowa.gov/

Visiting Nurse Services
- Private non-profit health provider, providing public health services since 1908. Offers flu immunizations, DNA testing, TB screening, health classes, healthy start/Storknest programs and senior assistance. Includes a community resource directory.
- http://vnsdm.org/

Polk County Conservation Board
- Created to acquire, develop, and maintain areas devoted to conservation and public recreation. Includes rules and policies, agendas and minutes, activities, rental facilities, volunteerism, and guides and maps.
- http://www.conservationboard.org/

Polk County Medical Society
- Represents professional and ethical physicians from both Polk and Warren counties. Includes information about membership, legislation, a bulletin and travel opportunities. Located in Des Moines.
- http://www.pcms.org/

Polk County Air Quality
- Information about air quality and pollution conditions in the area, open burning, monitoring, permits, rules and regulations.
- http://www.airquality.co.polk.ia.us/

Southeast Polk Community School District
- Calendar, lunch menus, class reunion information, newsletters, and school board agendas and minutes.
- http://www.se-polk.k12.ia.us/

North Polk Community School District
- Serves Alleman and Polk City. Includes administration information, board meeting minutes, and contact details.
- http://www.n-polk.k12.ia.us/