Ottumwa, IA
2025 and 2035 projected population

Ever wonder how many people live in Ottumwa, IA and how fast that number changes?

Aterio data team has developed an AI enhanced model that helps organizations understand the forecasted growth of population in Ottumwa, IA for years 2025 through 2035.

Population Growth Rate (Year over Year)

25,20025,40025,60025,80026,00026,200-1.00%-0.50%0.00%0.50%1.00%2020202120222023202420252026202720282029203020312032203320342035

2020

Population

25,545

Growth

0.00%

2021

Population

25,408

Growth

-0.54%

2022

Population

25,217

Growth

-0.75%

2023

Population

25,438

Growth

0.88%

2024

Population

25,648

Growth

0.83%

2025

Population

25,879

Growth

0.90%

2026

Population

25,913

Growth

0.13%

2027

Population

25,947

Growth

0.13%

2028

Population

25,988

Growth

0.16%

2029

Population

26,030

Growth

0.16%

2030

Population

26,072

Growth

0.16%

2031

Population

26,096

Growth

0.09%

2032

Population

26,115

Growth

0.07%

2033

Population

26,139

Growth

0.09%

2034

Population

26,164

Growth

0.09%

2035

Population

26,185

Growth

0.08%

Last update at Tue Jun 30 2026

Zip code level csv report on population forecast and economic development in Ottumwa, IA

Our team has created a comprehensive report on population forecast and economic development by zip code using our proprietary AI models.

Top 25 most populated zip codes in Ottumwa, IA

Our model provides a detailed 2025 through 2035 projected population growth for every zip code in Ottumwa, IA.

U.S. Zip code

2020 census

2025 population

2030 population

Open
5250129,61330,70630,936View full zip code report, 52501

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