Monroe County is a county in the western portion of the state of New York, in the United States. The county is along Lake Ontario’s southern shore. As of 2018, Monroe County’s population was 742,474, a decrease since the 2010 census. Its county seat is the city of Rochester. The county is named after James Monroe, the fifth President of the United States. Monroe County is part of the Rochester, NY Metropolitan Statistical Area. The current County Executive is Cheryl Dinolfo.
According to the U.S. Census Bureau, the county’s total area is 1,367 square miles (3,540 km), of which 657 square miles (1,700 km) is land and 710 square miles (1,800 km) (52%) is water.
Monroe County is in Western New York State’s northern tier, northeast of Buffalo and northwest of Syracuse. The northern county line is also the state line and the border of the United States, marked by Lake Ontario. Monroe County is north of the Finger Lakes.
As of the census of 2000, there were 735,343 people, 286,512 households, and 184,513 families residing in the county. The population density was 1,115 people per square mile (431/km²). There were 304,388 housing units at an average density of 462 per square mile (178/km²). The county’s racial makeup was 79.14% White, 13.75% African American, 0.27% Native American, 2.44% Asian, 0.03% Pacific Islander, 2.44% from other races, and 1.94% from two or more races. Hispanic or Latino of any race were 5.31% of the population. 18.6% were of Italian, 15.3% German, 11.3% Irish and 8.3% English ancestry according to Census 2000. 4.64% of the population reported speaking Spanish at home, while 1.43% speak Italian.
There were 286,512 households out of which 31.80% had children under the age of 18 living with them, 47.40% were married couples living together, 13.40% had a female householder with no husband present, and 35.60% were non-families. 28.60% of all households were made up of individuals and 9.90% had someone living alone who was 65 years of age or older. The average household size was 2.47 and the average family size was 3.08.
In the county, the population was spread out with 25.60% under the age of 18, 9.50% from 18 to 24, 29.30% from 25 to 44, 22.60% from 45 to 64, and 13.00% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 93.00 males. For every 100 females age 18 and over, there were 89.20 males.
The median income for a household in the county was $44,891, and the median income for a family was $55,900. Males had a median income of $41,279 versus $29,553 for females. The per capita income for the county was $22,821. About 8.20% of families and 11.20% of the population were below the poverty line, including 15.50% of those under age 18 and 7.40% of those age 65 or over.