Microsoft Visio(formerly Microsoft Office Visio) is a diagramming and vector graphics application and is part of the Microsoft Office family. The product was first introduced in 1992, made by the Shapeware Corporation, later renamed Visio Corporation. It was acquired by Microsoft in 2000. A lightweight version of Visio is now included with all commercial SKU of Microsoft 365 and is known as Visio in Microsoft 365. It has two other subscription based SKUs. Visio Plan 1 includes the Visio web app whereas Visio Plan 2 provides access to both the web app as well as the Desktop application.

Microsoft Visio is used to create diagram types such as Flowcharts, Org Charts, Floor Plans, Network Diagrams, UML Diagrams, Mind maps and more. It is also commonly used for scenarios such as Process Mapping and Visual Collaboration. The latest version of Visio also has data visualization that allows users to create diagrams from Excel data and also embed Visio diagrams in Power BI dashboards.

Microsoft made Visio 2013 for Windows available in two editions: Standard and Professional. The Standard and Professional editions share the same interface, but the Professional edition has additional templates for more advanced diagrams and layouts, as well as capabilities intended to make it easy for users to connect their diagrams to data sources and to display their data graphically. The Professional edition features three additional diagram types, as well as intelligent rules, validation, and subprocess (diagram breakdown). Visio Professional is also offered as an additional component of an Office365 subscription.

On 22 September 2015, Visio 2016 was released alongside Microsoft Office 2016. A few new features have been added such as one-step connectivity with Excel data, information rights management (IRM) protection for Visio files, modernized shapes for office layout, detailed shapes for site plans, updated shapes for floor plans, modern shapes for home plans, IEEE compliant shapes for electrical diagrams, new range of starter diagrams, and new themes for the Visio interface.

Database modeling in Visio revolves around a Database Model Diagram (DMD).