Hazen is an unincorporated community and census-designated place in North Sewickley Township, Beaver County, Pennsylvania, United States. It sits on the southwestern side of Connoquenessing Creek, where Brush Creek flows into it. It is 4 miles (6 km) southeast of Ellwood City and 8 miles (13 km) northeast of Beaver Falls. Via Connoquenessing Creek, Hazen is part of the Beaver River watershed flowing to the Ohio River. The population of Hazen was 163 as of the 2020 census.