The document proposes a Municipal GIS Capability Maturity Model to assess the development and operations of city and county GIS programs. It identifies two broad areas - enabling capability (e.g. technology, data, resources) and execution ability. Each area contains components that are rated on a scale from initial to optimized. The model is intended to allow municipalities to gauge their GIS maturity over time and against peer organizations. The author plans to survey Washington cities and counties to analyze data using the model and identify normative maturity levels.