Erina is the commercial hub of the Central Coast. There are many other major commercial businesses located throughout the suburb predominantly on The Entrance Road, Karalta Road and Barralong Road.
The suburb is home to the Erina Eagles rugby league team, who play in the Central Coast Premiership.
Disability service provider Fairhaven Services' charity store, Vintage Fair, is situated in Erina.
In the 2016 Census, there were 4,774 people in Erina. 69.9% of people were born in Australia. The next most common country of birth was England at 8.1%. 85.0% of people spoke only English at home. The most common responses for religion were Catholic 24.3%, Anglican 22.5% and No Religion 21.5%.
Schools in the local area include:
- Erina High School is a comprehensive high school that was established in 1964.
- Woodport Public School (Formerly known as Erina West Primary School)
- Central Coast Adventist School
Churches in Erina include EV Church and Coastlife Church. The Chinese Baptist Evelyn Tong Memorial Church is due for completion in late 2017.