Top 10 Biggest Towns in Kenya by Population and Size (2025)

Kenya is a country rich in culture, commerce, and diversity — and its towns reflect that perfectly. From the bustling streets of Nairobi to the serene shores of Kisumu, Kenya’s urban centers are growing rapidly, shaping the economic and cultural future of the nation.

In this article, we explore the top 10 biggest towns in Kenya based on a combination of population size and urban significance as of 2025. Whether you're planning to visit, invest, or simply curious, here’s your guide to the towns making the biggest impact in Kenya today.

Top 10 Biggest Towns in Kenya by Population and Size (2025)

1. Nairobi

2. Mombasa

3. Kisumu

4. Nakuru

5. Eldoret

6. Thika

7. Malindi

8. Kitale

9. Garissa

10. Kakamega

1. Nairobi

Population (2025 est.): 5.1 million+

Nairobi is not only the capital city of Kenya but also the largest urban area in the country. A hub for finance, innovation, transport, and culture, Nairobi is home to global organizations like the United Nations Environment Programme and a thriving tech scene known as "Silicon Savannah."

Key highlights

• Jomo Kenyatta International Airport (JKIA)
• Nairobi National Park within city limits
• Rapidly expanding suburbs like Westlands and Ruaka

2. Mombasa

Population (2025 est.): 1.3 million+

Located on the coast of the Indian Ocean, Mombasa is Kenya’s second-largest city and main port town. With a rich Swahili-Arab history, Mombasa blends culture, commerce, and tourism into a vibrant urban mix.

Key highlights

• Port of Mombasa (largest in East Africa)
• Fort Jesus, Old Town
• Tourist hotspots like Diani and Nyali

3. Kisumu

Population (2025 est.): 900,000+

Kisumu, nestled along the shores of Lake Victoria, is western Kenya’s largest city and a key economic center. It’s known for its lakeside charm, vibrant nightlife, and being the heartland of Luo culture.

Key highlights

• Lake Victoria fisheries and transport
• Impala Sanctuary
• Fast-growing real estate sector

4. Nakuru

Population (2025 est.): 800,000+

Once a colonial farming town, Nakuru has transformed into a rapidly growing urban hub. It gained city status in 2021, and continues to grow due to its strategic location between Nairobi and western Kenya.

Key highlights

• Lake Nakuru National Park
• Flower farming and agri-business
• Major highway and railway connections

5. Eldoret

Population (2025 est.): 700,000+

Famed as the home of Kenya’s long-distance running champions, Eldoret is a booming commercial town in the Rift Valley. It’s also a major educational and agricultural hub.

Key highlights

• Moi University
• Agricultural produce export center
• High-altitude training base for athletes

6. Thika

Population (2025 est.): 450,000+

Located just 40 km from Nairobi, Thika has grown into a major satellite town and industrial hub. It’s home to factories, educational institutions, and commercial activity that support Nairobi’s sprawl.

Key highlights

• Home to Del Monte plantations
• Thika Superhighway connectivity
• Rapid urbanization and gated communities

7. Malindi

Population (2025 est.): 300,000+

A popular resort town on the Kenyan coast, Malindi is known for its tourism, Italian expat community, and beachside charm. It has seen significant growth in infrastructure and real estate in recent years.

Key highlights

• Malindi Marine National Park
• Historical sites like Vasco da Gama Pillar
• Italian influence in architecture and cuisine

8. Kitale

Population (2025 est.): 250,000+

Kitale is a vital agricultural town in western Kenya. Often referred to as Kenya’s “breadbasket,” it produces maize, dairy, and horticultural products that serve the nation.

Key highlights

• Kitale Museum
• Major producer of maize and dairy
• Key link between Kenya and Uganda

9. Garissa

Population (2025 est.): 240,000+

Garissa, the largest town in northeastern Kenya, is an important administrative and commercial center in the region. It also serves as a cultural and economic hub for the Somali community.

Key highlights

• Tana River basin agriculture
• Garissa University
• Frontier economy with unique growth potential

10. Kakamega

Population (2025 est.): 220,000+

Kakamega is the heartbeat of western Kenya’s Luhya community and a growing commercial town. It is surrounded by lush greenery and the famous Kakamega Forest — Kenya’s only tropical rainforest.

Key highlights

• Kakamega Forest Reserve
• Masinde Muliro University
• Strong cultural heritage and trade

Conclusion

Kenya’s urban landscape is evolving fast. These ten towns are at the center of that change — driving the economy, connecting regions, and shaping the nation’s future. As population growth, devolution, and infrastructure continue to expand, these towns are only set to grow bigger and more influential.

Frequently Asked Questions (FAQ)

Which town is the capital of Kenya?

Nairobi is the capital city of Kenya. It is the country's political, economic, and cultural hub, as well as the largest urban area in East Africa.

What is the second-largest city in Kenya?

Mombasa is Kenya’s second-largest city. Located on the Indian Ocean, it serves as the country’s principal port and coastal tourism hotspot.

Which towns are part of the Nairobi Metropolitan Area?

Towns in the Nairobi Metropolitan Area include Ruiru, Thika, Kikuyu, Karuri, Ongata Rongai, and Limuru. These towns are rapidly growing due to their proximity to the capital.

Which is the largest town in Rift Valley, Kenya?

Nakuru is the largest town in the Rift Valley and became a city in 2021. It's a major commercial, agricultural, and tourism center.

Is Kisumu among the largest towns in Kenya?

Yes, Kisumu ranks among Kenya’s largest cities, with a population of over 900,000. It’s the third-largest city and a key port on Lake Victoria.

What are some fast-growing towns in Kenya?

Fast-growing towns in Kenya include Ruiru, Thika, Naivasha, Kitengela, and Ongata Rongai. These areas are expanding due to infrastructure, devolution, and urban migration.

Which towns in Kenya are along the coast?

Mombasa is the largest coastal city, followed by Malindi and Kilifi. These towns are known for tourism, trade, and rich Swahili culture.