OCAS Application Services, formerly known as the Ontario College Application Service (OCAS) is a non-profit corporation created in 1991 by the Colleges of Applied Arts and Technology and Institutes of Technology and Advanced Learning in the province of Ontario, Canada.

OCAS represents Ontario's 24 Colleges of Applied Arts and Technology (CAAT). Three non-CAAT institutions also use the ontariocolleges.ca service for their applications. The centralized platform provides application-to-college services in English and French through its ontariocolleges.ca brand.

In 2017, OCAS introduced its International Application Service (IAS) as a new platform for use by international departments at Ontario's public colleges. To date, over half of Ontario's colleges as well as one Ontario university, use the OCAS IAS.

It also offers a centralized data warehouse of applicant information for colleges, high schools and government.

OCAS is located in Guelph, Ontario.

• List of colleges in Ontario
• Ontario Universities' Application Centre
• University and college admission

• Ontario College Application Service

43°29′26″N 80°12′35″W / 43.49044°N 80.20960°W / 43.49044; -80.20960