According to the U.S. Census Bureau, the township has a total area of 20.9 square miles (54 km2), of which 20.7 square miles (54 km2) is land and 0.2 square miles (0.52 km2) (1.15%) is water. It is drained by the Schuylkill River, which forms its natural northeastern boundary.
Its unincorporated communities include Angelica, Clover Park, Colonial Hills, Farview, Flying Hills, Freemanville, Gouglersville, Grill, Pennwyn, Ridge Park, and Ridgewood.
At the 2000 census, there were 13,816 people, 5,941 households, and 3,808 families in the township. The population density was 668.0 inhabitants per square mile (257.9/km2). There were 6,127 housing units at an average density of 296.3 per square mile (114.4/km2). The racial makeup of the township was 93.84% White, 1.92% African American, 0.06% Native American, 1.88% Asian, 0.04% Pacific Islander, 1.27% from other races, and 0.99% from two or more races. Hispanic or Latino of any race were 2.82%.[6]
There were 5,941 households, 24.1% had children under the age of 18 living with them, 54.6% were married couples living together, 6.8% had a female householder with no husband present, and 35.9% were non-families. 28.8% of households were made up of individuals, and 12.5% were one person aged 65 or older. The average household size was 2.27 and the average family size was 2.81.
The age distribution was 19.0% under the age of 18, 7.1% from 18 to 24, 26.9% from 25 to 44, 27.4% from 45 to 64, and 19.7% 65 or older. The median age was 43 years. For every 100 females, there were 92.2 males. For every 100 females age 18 and over, there were 89.5 males.
The median household income was $50,103 and the median family income was $58,161. Males had a median income of $42,108 versus $27,701 for females. The per capita income for the township was $28,996. About 1.4% of families and 4.4% of the population were below the poverty line, including 3.1% of those under age 18 and 5.1% of those age 65 or over.
As of 2019, there were 100.62 miles (161.93 km) of public roads in Cumru Township, of which 29.44 miles (47.38 km) were maintained by the Pennsylvania Department of Transportation (PennDOT) and 71.18 miles (114.55 km) were maintained by the township.[9]
Numerous highways serve Cumru Township, including Interstate 176, U.S. Route 222, U.S. Route 222 Business (Lancaster Pike), U.S. Route 422, Pennsylvania Route 10, Pennsylvania Route 625, and Pennsylvania Route 724. I-176 follows the Morgantown Expressway southward from its northern terminus at US 422 across the eastern portion of the township. US 222 follows a north-south alignment along the western edge of the township. US 422 follows the West Shore Bypass along a northwest-southeast alignment across the northern part of the township. US 222 Business begins along US 222 and heads northeastward along Lancaster Avenue across the northwestern part of the township. PA 10 follows Morgantown Road along a north-south alignment across the eastern part of the township. PA 625 follows New Holland Road along a north-south alignment through the center of the township. Finally, PA 724 follows Philadelphia Avenue along an east-west alignment across the northern part of the township.
