As of the 2021 Census, South River had a population of 1,101 residents. The village covers a land area of 4.11 square kilometers, resulting in a population density of about 267.9 people per square kilometer. The median age is 46 years, with males comprising 49.8% of the population and females 50.2%. A significant portion of the community, 39.9%, is married, while 17.6% live in common-law arrangements.

The housing market in South River is predominantly composed of single detached homes, many of which were constructed before 1960. The median list price for single-family homes was approximately $469,473 as of February 2025, reflecting a decrease from $651,627 in January 2025. The median price per square foot during this period was $396.

The local economy features a diverse range of occupations. Sales and service positions account for 25.6% of employment, trades and transport roles make up 24.4%, and manufacturing and utilities represent 19.8%. The unemployment rate stands at 16.5%.

English is the predominant language, spoken as a first language by 95.3% of residents. French is the first language for 1.4% of the population, and 3.3% speak other languages.

South River offers a close-knit community atmosphere with access to natural attractions such as the South River itself and nearby lakes. The village’s proximity to Algonquin Provincial Park provides residents and visitors with opportunities for hiking, canoeing, and wildlife observation. Local amenities include shops, restaurants, and community centers that host various events throughout the year.

South River is a village that combines small-town charm with access to some of Ontario’s most beautiful natural landscapes, making it an attractive location for both residents and visitors.