According to the 2010 census, the township has a total area of 67.09 square miles (173.8 km2), of which 64.25 square miles (166.4 km2) (or 95.77%) is land and 2.83 square miles (7.3 km2) (or 4.22%) is water.[4]
As of the 2020 census, there were 5,728 people, 2,315 households, and 2,600 housing units. The racial makeup of the township was; 5,506 were White alone, 18 were American Indian/Alaska Native alone, 18 were Asian alone, 3 were Black/African American alone, 16 were of some other race, and 167 were two or more races. 56 were Hispanic/Latino of any race. The ancestry makeup of the township was; 25.1% German, 13.6% Irish, 13.4% English, 2.1% French (except Basque), 2.1% Scottish, 0.8% Italian, and 0.6% Polish. Of spoken languages; 97.7% only spoke English at home, 0.7% spoke Spanish at home, and 1.6% spoke Asian/Pacific Islander languages at home.[3]
The median income of the township was $63,603. 10% were under the poverty line. Homeownership was 67.5% within the township. Of the 2,335 occupied housing units within the township, 909 were married, 37 had a male householder with no spouse present, and 161 had a female householder with no spouse present. 13.2% had one bedroom, 70.4% had 2 or 3 bedrooms, and 16.4% had 4 or more bedrooms. Of all housing units, 265 are vacant.[3]
The gender makeup of the township was; Of males; 248 were under 5 years of age, 133 were between the ages of 5-9 years, 217 were between the ages of 10-14 years, 149 were between the ages of 15-19 years, 210 were between the ages of 20-24 years, 237 were between the ages of 25-29 years, 121 were between the ages of 30-34 years, 194 were between the ages of 35-39 years, 153 were between the ages of 40-44 years, 206 were between the ages of 45-49, 147 were between the ages of 50-54 years, 193 were between the ages of 55-59 years, 164 were between the ages of 60-64 years, 57 were between the ages of 65-69 years, 147 were between the ages of 70-74 years, 54 were between the ages of 75-79 years, 71 were between the ages of 80-84 years, and 65 were over 85 years of age. Of females; 216 were under 5 years of age, 124 were between the ages of 5-9 years, 100 were between the ages of 10-14 years, 81 were between the ages of 15-19 years, 199 were between the ages of 20-24 years, 265 were between the ages of 25-29 years, 119 were between the ages of 30-34 years, 162 were between the ages of 35-39 years, 155 were between the ages of 40-44 years, 230 were between the ages of 45-49, 146 were between the ages of 50-54 years, 221 were between the ages of 55-59 years, 173 were between the ages of 60-64 years, 217 were between the ages of 65-69 years, 207 were between the ages of 70-74 years, 66 were between the ages of 75-79 years, 68 were between the ages of 80-84 years, and 181 were over 85 years of age. The median age of the township was 41.1.[3]
Of education and employment, 42.7% had a high school or equivalent degree, 20.7% went to college but had no degree, 4.6% had an associate's degree, 11.6% had a bachelor's degree, and 8.5% had a graduate or professional degree. School enrollment was 65.8%, of which, in nursery school or preschool was 4.6%, in kindergarten to 12th grade was 65.8%. Of employers, 70.9% were employees of private companies, 4.3% were self-employed in their own incorporated business workers, 13% were private not-for-profit wage and salary workers, 10% were local, state, and federal government workers, and 1.7% self-employed on their own, not incorporated business workers, or are unpaid family workers. The employment rate was 61.8%
Education
Brookville Township residents may obtain a free library card from the Franklin County Public Library District in Brookville.[6]