First 100 Days in Office: A Guide for New Mayors

The first 100 days in office have become one of the most talked-about benchmarks in politics. For newly elected mayors, it can feel like a countdown starts the moment you win. While that pressure is real, it can be misleading.

The first 100 days aren’t about rushing to check off campaign promises. They’re about setting the foundation for everything that comes next. The habits you build, the relationships you form, and the systems you put in place will shape your entire term far more than any single early policy win.

In this guide, we’ll break down what to do in your first 100 days as a mayor, what actually matters during this period, and how both leaders and voters can think about early performance in a more meaningful way.

What the First 100 Days Really Mean

The idea of the “first 100 days” comes from national politics, but it’s increasingly becoming a benchmark for local leaders.

Many mayors now release formal 100-day plans or progress reports. For example:

• Akron, Ohio’s mayor Shammas Malik outlined a structured 100-day plan focused on economic development and public safety.
• Philadelphia, Pennsylvania’s mayor Cherelle L. Parker published a formal 100-day action plan at the start of her administration, framing early priorities around public safety, cleanliness, economic opportunity, and government operations.
• Colorado Springs’ mayor Yemi Mobolade publicly tracked progress during his first 100 days in office.
• St. Louis, Missouri’s mayoral office published a detailed first 100 days update organized around priority areas like onboarding leadership, public safety, city services, and transparency.

Across many major cities, local leaders are often expected to report early wins and momentum as a signal of effectiveness because, ultimately, people want to see that leadership is active and responsive from day one.

However, research from the Bloomberg Harvard City Leadership Initiative suggests that how mayors manage their time during transitions, especially early on, has a lasting impact on their effectiveness, often more than the speed of early policy rollout.

Why the First 100 Days Matter for Mayors

For new mayors, the first 100 days are less about immediate transformation and more about long-term positioning.

This period sets the tone for:

• How you lead. Are you reactive or thoughtful? Collaborative or isolated? Focused on optics or outcomes?
• How you build trust. Staff, colleagues, and constituents are all forming their first impressions of your leadership style.
• How decisions get made. You’re learning the formal rules and the informal dynamics that actually shape local government.
• How sustainable your approach is. Pushing too hard too fast can create burnout, resistance, or poor decisions that are difficult to reverse.

That’s why experienced officials recommend a measured, intentional approach, especially in the first few weeks.

LEARN MORE: Learn how to effectively make the transition from candidate to elected official.

How to Approach Your First 100 Days in Office

If you’re wondering what to do in your first 100 days as mayor, the answer isn’t to just do everything. Rather, focus on doing the right things in the right order.

Here’s a practical framework to guide your first three months.

Step #1: Start With Observation, Not Overhaul

Your instinct may be to act quickly, but the most effective mayors begin by understanding how things actually work.

During your first 30 days, focus on:

• How meetings are conducted
• Informal power structures that don’t show up on org charts
• Which staff members others rely on for information
• The pace and style of decision-making
• Body language and dynamics in the room

This is your opportunity to listen more than you speak.

A helpful practice is to keep a daily observation journal. Track key players, questions you have, and patterns you’re noticing. These early insights may shape your approach to the rest of your term.

Step #2: Learn the System Before You Try to Change It

Campaigns teach you what should happen. Governing requires understanding what is already happening.

Early in your term, review:

• Procedural rules and governing documents
• Recent meeting minutes and decisions
• Budget documents
• Ongoing projects and initiatives
• The historical context behind current issues

This helps you avoid a common mistake: proposing changes without fully understanding constraints, tradeoffs, or past attempts.

Step #3: Build Relationships That Make Governance Possible

Your effectiveness as mayor depends heavily on your relationships.

Start by scheduling one-on-one meetings with:

• Fellow elected officials
• Department heads
• Key administrative staff
• Community leaders

In those conversations, focus on listening. Seek to understand their priorities, current challenges, and what they think new mayors typically get wrong in the community. Strong relationships early on will make everything else easier, from passing policies to resolving conflicts.

Step #4: Build a System for Listening to Your Community

One of the biggest risks in your first 100 days is relying on the loudest voices instead of the full community.

Instead, build a simple, repeatable listening system:

• Regular office hours
• Community surveys
• Town halls or listening sessions
• Direct outreach to underrepresented groups

The goal is not just to hear feedback, but to identify patterns and priorities.

LEARN MORE: See how you can start sending community surveys to better understand the people you serve.

Step #5: Identify Early Wins That Build Momentum

While you shouldn’t rush major reforms, small, meaningful wins can help build trust and credibility.

Good early goals should show progress on campaign priorities, address immediate community needs, and be achievable within existing constraints. They don’t need to be sweeping reforms.

Examples of strong first 100 days goals include:

• Launching a citywide community survey to gather resident priorities
• Conducting a review or audit of key departments or services
• Improving communication systems with residents, such as newsletters or town halls
• Addressing a visible quality-of-life issue in the community
• Establishing regular office hours or listening sessions
• Creating a clear process for tracking and responding to constituent concerns

These types of goals build trust early while laying the groundwork for larger, longer-term initiatives.

Step #6: Establish Your Identity as a Public Servant

Your habits in the first 100 days will shape how people see you for the rest of your term.

To be an effective public servant:

• Show up prepared for meetings
• Ask thoughtful, informed questions
• Focus on solving problems, not just messaging
• Communicate clearly and honestly
• Be consistent in how you show up

This is where you begin to define yourself, not as a candidate, but as a governing leader.

How to Create a First 100 Days Plan as Mayor

Once you understand your priorities, the next step is turning them into a clear and manageable plan. Your first 100 days plan doesn’t need to be complicated. It just needs to be focused and realistic.

A strong plan should include:

• Learning Goals: What do you need to understand about your city, staff, and systems?
• Relationship-Building Priorities: Who do you need to meet with and build trust with early on?
• Early Policy Priorities: What are 2–3 issues where you can make meaningful early progress?
• Communication Strategy: How will you keep constituents informed during your first months in office?
• Personal Sustainability Plan: How will you manage your time and energy to stay effective over the long term?

The goal isn’t to map out your entire term. It’s to create enough structure to stay focused while remaining flexible as you learn.

Common Mistakes New Mayors Make Early On

Even strong candidates can struggle in their first 100 days if they fall into these traps:

• Moving Too Fast Without Context: Pushing for change before understanding the system can backfire.
• Prioritizing Visibility Over Substance: Announcements and social media posts don’t replace effective governance.
• Ignoring Internal Relationships: Success depends as much on staff and colleagues as it does on public support.
• Trying to Do Everything at Once: Spreading yourself too thin leads to burnout and missed priorities.
• Staying in Campaign Mode: Governing requires a different mindset than campaigning.

LEARN MORE: Make the most of the start of your term with these 12 rules for newly elected officials.

How Voters Can Evaluate a Mayor’s First 100 Days

For voters, the first 100 days can offer useful signals, but they shouldn’t be the final verdict.

Instead of wondering if they delivered everything their campaign promised immediately, consider:

• Are they taking time to understand the role?
• Are they building relationships and listening to the community?
• Are they communicating clearly and transparently?
• Are early actions aligned with long-term priorities?

Some mayors release formal 100-day reports or updates, and these can be helpful. But real impact often takes longer to materialize. Remember: The first 100 days are about direction, not completion.

The First 100 Days Are Just the Beginning

The first 100 days as mayor matter, but they’re not the whole story. What matters more is what those 100 days set in motion.

If you take the time to learn, build relationships, and establish strong systems early on, you create a foundation for effective, consistent governance over your entire term. However, if you rush to prove yourself without that foundation, even early wins can become long-term challenges.

At GoodParty.org, we believe the most effective local leaders aren’t the ones who move the fastest in their first 100 days. They’re the ones who build trust, listen deeply, and govern with integrity from day one.

Photos by RDNE Stock project and Mary Muñoz