| Statistic | Federal Way | Washington | National |
| Population | 100,624 | 7,794,858 | 336,919,644 |
| Population density (sq mi) | 4,529 | 117 | 91 |
| Median age | 36.2 | 37.6 | 37.7 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 52% | 56% | 55% |
| Families w/ Kids under 18 | 44% | 44% | 43% |
| Speak English | 64% | 81% | 79% |
| Speak Spanish | 12% | 8% | 13% |

Federal Way demographics provide invaluable insights into the composition, dynamics and needs of urban and rural areas, enabling them to plan, develop, and govern in ways that promote prosperity, equity and well-being for all residents. The Federal Way population is 100,624 and has a population density of 4,529 people per square mile, compared to the national average of 91. The median age of all residents is 36.2, 52% of people 15 years of age or older are married and 44% have kids under the age of 18. In Federal Way, 16% of households have a median income that is below $25,000 and 23% of households report a median income above $150,000.
Understanding the Federal Way racial demographics and ethnic composition is paramount for addressing systemic inequities, advancing social justice and inclusion and fortifying communities. In Federal Way, the racial breakdown indicates 48.8% White, 15.7% Black or African American, 14% Asian, 1% American Indian and 2.3% Native Hawaiian, with 17.5% of the population identifying as Hispanic or Latino. Notably, 63.8% of households reported speaking English only, while 11.9% reported speaking Spanish only. Additionally, 26.7% of residents were categorized as foreign-born.
In areas with high population density, residents enjoy a wealth of amenities and services conveniently located within walking distance or a short commute. Access to healthcare facilities, educational institutions, cultural venues, dining options, retail stores and public transit enhances residents' quality of life and overall well-being. Federal Way has a population density of 4,529 people per square mile, which far exceeds the national average of 91 and ranks among the most densely populated cities in the country.
Policy Planning: Demographic data and statistics serve as vital tools for informing policy and decision-making processes across various levels of government, as well as within organizations and businesses. Through the reporting and analysis of demographic data, policymakers, government officials, and organizational leaders can pinpoint areas of need, allocate resources efficiently, and craft tailored policies and programs to address the unique needs and priorities of different demographic groups. The utilization of demographic data in Federal Way is instrumental in policy planning, facilitating resource allocation, evidence-based decision-making, priority identification, trend forecasting, policy impact assessment, and the promotion of equity and inclusion. By harnessing this data effectively, policymakers can devise targeted, impactful, and inclusive policies that cater to the diverse needs of communities.
Healthcare Planning: The analysis of Federal Way demographics can offer insights into healthcare planning and delivery, identifying population health needs, disparities and risk factors. By understanding demographic trends, healthcare providers and policymakers can allocate resources effectively, develop prevention and intervention programs and address health inequities within communities. Through the use of demographic data and statistics, healthcare providers and policymakers aim to achieve equitable, accessible and high-quality healthcare for all individuals and communities. This proactive approach to healthcare planning ensures targeted interventions, efficient resource allocation and customized healthcare services to meet the diverse needs of populations.
Social Cohesion: The analysis and understanding of demographics are essential for promoting social cohesion and fostering appreciation among diverse communities. By embracing and acknowledging differences in Federal Way demographics, societies can promote inclusivity, diversity and social harmony while addressing social inequalities and advocating for equal opportunities. Racial demographics can reflect the diversity within a population and are instrumental in fostering inclusive and welcoming communities. Embracing ethnic diversity strengthens social connections, promotes cultural understanding and enriches society by celebrating the contributions of individuals from diverse racial and ethnic backgrounds.
| Race | Federal Way | Washington | National |
| White | 48.76% | 77.34% | 73.35% |
| Black | 15.74% | 3.63% | 12.63% |
| Asian | 13.96% | 7.80% | 5.22% |
| American Indian | 0.96% | 1.33% | 0.82% |
| Native Hawaiian | 2.32% | 0.63% | 0.18% |
| Mixed race | 9.37% | 5.34% | 3.06% |
| Other race | 8.89% | 3.92% | 4.75% |