The Isabella Furnace of Carnegie Steel was located in Etna, operating until 1953.

[6] It is located off Route 28 from Pittsburgh and borders the Allegheny river and Pine Creek.

According to the United States Census Bureau, the borough has a total area of 0.8 square miles (2.1 km2), all land.

Nearby to the west is Millvale and Pittsburgh is immediately across the Allegheny River to the south.

Etna Riverfront is a recreational area that borders the Allegheny River, with paved walking paths, lookout spots, benches and picnic tables.

Etna is part of the Shaler Area School District, which encompasses multiple of Pittsburgh's northern suburbs.