The Toyota Prius has been setting fuel economy records for more than 25 years.

When the first Prius arrived in North America in 2001, achieving nearly 50 MPG seemed unbelievable. Today, the latest Prius can reach up to 57 MPG combined while offering more power, better technology, and a much more stylish design.

But not every Prius generation delivers the same fuel economy.

Some model years are known for exceptional efficiency, while others offer the best balance between fuel savings, reliability, and affordability.

In this guide, we’ll compare every Toyota Prius generation from 2001 through 2026, examine official MPG ratings, and help you determine which Prius is the best choice for your budget and driving needs.

Prius MPG Evolution: 2001–2026

One of the most impressive things about the Prius is how steadily its fuel economy has improved over time.

Generation	Years	Best Combined MPG
First Generation	2001–2003	48 MPG
Second Generation	2004–2009	46 MPG
Third Generation	2010–2015	50 MPG
Fourth Generation	2016–2022	56 MPG
Fifth Generation	2023–2026	57 MPG

Over five generations, Toyota improved Prius fuel economy by nearly 19%, while also increasing performance, safety, and interior space.

The first-generation Prius was Toyota’s introduction to the American hybrid market.

Although modest by today’s standards, it demonstrated that a gasoline-electric hybrid could dramatically reduce fuel consumption without sacrificing practicality.