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3 Cities and towns
Geography\nAccording to the U.S. Census Bureau, the county has a total area of 2,058 km² (795 mi²). 2,042 km² (789 mi²) of it is land and 16 km² (6 mi²) of it is water. The total area is 0.79% water.
Demographics\nAs of the census2 of 2000, there are 174,083 people, 65,862 households, and 46,827 families residing in the county. The population density is 85/km² (221/mi²). There are 69,868 housing units at an average density of 34/km² (89/mi²). The racial makeup of the county is 97.83% White, 0.79% Black or African American, 0.09% Native American, 0.56% Asian, 0.03% Pacific Islander, 0.17% from other races, and 0.54% from two or more races. 0.58% of the population are Hispanic or Latino of any race.
There are 65,862 households out of which 32.90% have children under the age of 18 living with them, 59.80% are married couples living together, 8.10% have a female householder with no husband present, and 28.90% are non-families. 24.20% of all households are made up of individuals and 10.40% have someone living alone who is 65 years of age or older. The average household size is 2.55 and the average family size is 3.04.
In the county, the population is spread out with 24.60% under the age of 18, 8.80% from 18 to 24, 29.40% from 25 to 44, 23.00% from 45 to 64, and 14.30% who are 65 years of age or older. The median age is 38 years. For every 100 females there are 95.40 males. For every 100 females age 18 and over, there are 91.80 males.
Cities and towns\n*Adams Township\n*Allegheny Township\n*Brady Township\n*Bruin\n*Buffalo Township\n*Butler Township\n*Butler\n*Callery\n*Center Township\n*Cherry Township\n*Cherry Valley\n*Chicora\n*Clay Township\n*Clearfield Township\n*Clinton Township\n*Concord Township\n*Connoquenessing Township\n*Connoquenessing\n*Cranberry Township\n*Donegal Township\n*East Butler\n*Eau Claire\n*Evans City\n*Fairview Township\n*Fairview\n*Fernway\n*Forward Township\n*Fox Run\n*Franklin Township\n*Harmony\n*Harrisville\n*Homeacre-Lyndora\n*Jackson Township\n*Jefferson Township\n*Karns City\n*Lancaster Township\n*Marion Township\n*Mars\n*Meadowood\n*Mercer Township\n*Meridian\n*Middlesex Township\n*Muddy Creek Township\n*Nixon\n*Oak Hills\n*Oakland Township\n*Parker Township\n*Penn Township\n*Petrolia\n*Portersville\n*Prospect\n*Saxonburg\n*Seven Fields\n*Shanor-Northvue\n*Slippery Rock Township\n*Slippery Rock\n*Summit Township\n*Valencia\n*Venango Township\n*Washington Township\n*West Liberty\n*West Sunbury\n*Winfield Township\n*Worth Township\n*Zelienople