Abstract Objectives Restaurants are subject to far less regulation than packaged foods when it comes to disclosing nutritional information. However, this sector is increasingly prominent in consumer's food purchasing and consumption habits. Health Canada is developing new front-of-package (FOP) warning labels for packaged food and beverage products, which if applied to restaurant foods could help consumers avoid foods high in nutrients of public health concern. The objective of this study was therefore to assess the proportion of menu items that would be required to carry FOP symbols if they were applied to the restaurant sector. Methods Nutrient data for food and beverage menu items (n = 10,950) were collected from the websites of restaurants with ≥20 Canadian outlets in 2016. Each item was assessed according to Health Canada's FOP thresholds for saturated fat, sodium, and sugar to determine eligibility for each warning symbol if the regulations were extended to restaurant foods. Results Of all eligible menu items, 79% would require ≥1 FOP symbol and 48% would require ≥2. In terms of nutrients, ≥47% of all items would require a sodium or saturated fat warning. 79% of all beverages and desserts would require a sugar warning. When distinguishing between types of restaurants, proportions from fast-food and sit-down establishments were similar overall, but varied by category. Conclusions The majority of menu items are high in nutrients of public health concern, thus there is an urgent need for regulations that apply to both packaged and restaurant items to improve their nutritional quality and assist consumers in making healthier choices when eating out. Such warning labels could also stimulate product reformulation and the introduction of healthier choices by the restaurant sector. Funding Sources This research was supported by a CIHR Project Operating Grant. KMD was supported by an Endeavour Research Fellowship and a Foundation for High Blood Pressure Research Early Career Transition Grant.