This guidebook serves to introduce a questionnaire based on an innovative endeavor to compile a set of indicators that are relevant to cities to accelerate local efforts to achieve the Sustainable Development Goals (SDGs). Depending on the circumstances and conditions specific to each city, relevant indicators that may be useful to consider for measuring performance may differ. Consequently, we provide a database of indicators for each SDG, which is represented by each file. Since CityNet invites areas that have more than 100,000 inhabitants as its members, indicators included in the database take into account activities that are more pertinent to such size of the city. This questionnaire serves to facilitate local assessments on ongoing efforts to achieve the United Nations (UN) Sustainable Development Goals (SDGs).