Beyond telling people what your nonprofit has accomplished, an impact report should also help them see the scale, reach, and meaning of that work. One of the simplest ways to do that? Put your impact on a map. A live, interactive map can answer a question that is often difficult to communicate through statistics alone: What did our organization’s reach look like this year, and what does that tell us about our impact?

Instead of asking supporters to interpret a list of cities, counties, schools, program sites, or communities served, you can give them a visual representation of where your organization showed up. And unlike a static map included in a PDF, a live map can invite people to explore.

Why Put a Map in Your Impact Report?

If, for example, you served 4,250 people across 18 communities, that’s useful information to share with your supporters. Now imagine seeing those 18 communities highlighted across a map, with the ability to click on each location and learn more about the people served, programs delivered, funds distributed, or outcomes achieved. That creates an experience for supporters to develop a deeper understanding of your impact.

A live impact map can help you:

• Show geographic reach: Make it immediately clear how far your organization’s work extends.
• Connect numbers to places: Give statistics geographic and human context.
• Highlight local impact: Show supporters exactly where programs, grants, services, or investments happened.
• Tell a more emotional story: Let people explore individual communities rather than presenting impact as one large aggregate number
• Create opportunities for discovery: Allow users to zoom, click, filter, and explore the work that interests them.
• Build transparency: Make it easier for donors, partners, board members, and community members to understand where resources are going.

The best impact maps connect geography to outcomes. Instead of simply placing a marker on Denver, for example, a marker might tell a visitor that your organization provided 350 services to local families, distributed $75,000 in grants, or partnered with six community organizations there.

What Could an Impact Map Include?

Your map can be as simple or sophisticated as your data allows. You might map:

• People or households served
• Program locations
• Grants awarded
• Schools or community partners
• Volunteer activity
• Events
• Housing units created or preserved
• Meals distributed
• Scholarships awarded
• Conservation projects
• Communities receiving funding
• Countries or regions reached
• Donor or fundraising campaigns
• Before-and-after outcomes

You can also use layers to tell different parts of the story. For example, a housing nonprofit could have separate layers for homes built, families served, community partners, and funding invested. A foundation could map grant recipients by focus area, allowing visitors to turn different categories on and off.

Technology Options for Building an Impact Map

There isn’t one right platform for every nonprofit. Your best option depends on your data, design needs, technical capacity, and how much exploration you want to give your audience.

Google My Maps: Simple, Accessible, and Curated

For nonprofits looking for a relatively easy way to create an interactive map, Google My Maps can be a good starting point. You can create a map containing the places supported during the impact-report year, import geographic data, organize locations into layers, customize markers, add descriptions, and embed the finished map directly into a webpage.

Visitors can pan, zoom, and click individual locations without leaving the report. This approach works particularly well when the goal is simple, curated storytelling rather than sophisticated data analysis. It’s also relatively approachable for nonprofit staff who may need to update the map each year without relying heavily on a developer.

One caveat: while the map itself can be customized, it will still feel recognizably like a Google interface. If your impact report is highly designed and branded, that can create a visual disconnect.

Mapbox: More Design and Data Control

If you want your map to feel like a true extension of your organization’s digital experience, Mapbox provides significantly more control. Mapbox allows developers to bring in geographic data and control how that data is presented. You can customize styles, fonts, icons, data layers, and interactions.

For example, you could design your map so that its colors, typography, icons, and visual hierarchy align with your organization’s brand.

Another benefit is that styles created in Mapbox Studio can be updated and published without redeploying the entire application. That can make ongoing map management more efficient for organizations with the right technical infrastructure.

The tradeoff? Mapbox typically requires more development expertise than a tool like Google My Maps.

Foundation Maps: When the Map Is Also a Research Tool

For foundations and organizations working within philanthropy, Foundation Maps offers another interesting model. Foundation Maps allows users to explore funders, recipients, and grants through maps, lists, search, filters, charts, and other views.

This approach is less about creating a beautifully curated annual-report experience and more about data exploration and transparency.

If your goal is to allow researchers, partners, funders, or community members to dig deeply into your grantmaking data, this type of platform can be especially useful.

Flourish: Data Visualization + Storytelling

Another option worth considering is Flourish. Flourish is designed around data visualization and interactive storytelling, making it useful when your map is one component of a larger data story.

For example, your impact report could move from: Here’s where we worked > here’s who we reached > here’s what changed.

Interactive maps can be combined with charts, animations, and other visualizations to create a more immersive digital report experience.

ArcGIS StoryMaps: Maps as the Story

For organizations with particularly rich geographic information, ArcGIS StoryMaps is another option. Rather than treating the map as one element embedded inside a report, StoryMaps can make geography a central part of the storytelling experience.

This could work particularly well for organizations whose impact is inherently place-based, such as environmental organizations, community development organizations, disaster response organizations, or nonprofits working across regions or countries.

A Custom-Built Map

Finally, there is the most flexible option: build your own. A developer can create a map specifically around your organization’s data, brand, website, and impact-report experience.

That could include custom filters, search functionality, animations, geographic boundaries, data visualizations, hover states, storytelling elements, and connections to your organization’s existing database or CRM.

The downside is obvious: cost, complexity, and ongoing maintenance.

But for organizations with substantial geographic data or a map that will become a long-term public resource and not just an annual report feature, a custom build may make sense.

The Biggest Risk: The Map Becomes a Distraction

If you’re putting significant effort into making your impact report feel polished, emotional, and distinctly connected to your organization, suddenly dropping someone into a generic third-party interface can feel jarring. Your map shouldn’t feel like you’ve sent your reader somewhere else. It should feel like part of the report.

That means thinking about the experience around the map, not just the map itself.

• Introduce it with context.
• Explain what the visitor is looking at.
• Use your organization’s language.
• Connect locations to stories and outcomes.
• Make the visual design feel intentional.

And, most importantly, don’t make people work too hard to understand what they’re seeing. A map covered in hundreds of indistinguishable pins isn’t necessarily an effective impact story.

Design the Map Around the Question

Before choosing a technology, ask yourself: What question should this map help our audience answer?

Imagine a donor reading that your organization supported 42 communities this year. They could read the number, nod, and move on. Or they could see those 42 communities appear across a map, click into one that is familiar to them, discover the work that happened there, read a story about someone impacted, and then zoom back out to see the full scope of the organization’s reach.

That’s the difference between reporting impact and helping someone experience it.