| Statistic | Plymouth | Wisconsin | National |
| Population | 8,981 | 5,966,344 | 336,919,644 |
| Population density (sq mi) | 1,735 | 110 | 91 |
| Median age | 44.4 | 39.1 | 37.7 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 60% | 57% | 55% |
| Families w/ Kids under 18 | 37% | 43% | 43% |
| Speak English | 98% | 91% | 79% |
| Speak Spanish | 0% | 5% | 13% |

The demographics of Plymouth offer invaluable insights into the composition, dynamics and needs of both urban and rural areas, empowering planners, developers and policymakers to foster prosperity, equity, and well-being for all residents. With a population of 8,981, Plymouth exhibits a population density of 1,735 people per square mile, contrasting with the national average of 91. The median age stands at 44.4, with 60% of individuals aged 15 or older being married and 37% having children under 18. In terms of income equality in Plymouth, 26% of households report a median income below $25,000, while 9% report an income exceeding $150,000, showcasing a diverse economic landscape.
The Plymouth racial demographics and ethnicity breakdown serves as a critical tool for understanding and addressing systemic inequities, promoting social justice and inclusion and building stronger, more resilient communities. The racial breakdown in Plymouth is 96.1% White, 1.7% Black or African American, 0.7% Asian, 0% American Indian and 0% Native Hawaiian - 2.9% of the population identify as Hispanic or Latino. Of all households, 98.2% reported speaking English only, while 0.5% reported speaking Spanish only. A total of 1.5% of residents were considered foreign born.
Communities such as Plymouth, with population densities higher than the average, play a significant role in promoting environmental sustainability by decreasing per capita energy consumption, greenhouse gas emissions and land use. Their compact urban development encourages the adoption of energy-efficient buildings, walking, cycling, and public transportation, fostering sustainable lifestyles and minimizing environmental impact. Additionally, densely populated areas tend to cultivate vibrant social and cultural scenes, fueled by a diverse population that contributes to a myriad of cultural events, festivals and community activities. This cultural diversity sparks creativity, innovation and cross-cultural exchange, enriching the social fabric of the community. Plymouth has a population density of 1,735, surpassing the national average of 91 people per square mile, as it stands poised to reap the benefits of dense urban living.
Education Allocation: Plymouth demographics can play a pivotal role in guiding education planning, offering insights into student demographics, school enrollment patterns, and educational requirements. This data aids schools and policymakers in resource allocation and the development of effective educational programs. It serves as a critical tool for identifying disparities in educational access and outcomes among diverse demographic groups, such as racial and ethnic minorities, socio-economic status, and students with disabilities. Through the disaggregation of data by demographic factors, education planners can pinpoint areas of inequity and implement targeted interventions to enhance access, support, and outcomes for marginalized students. Ultimately, Plymouth demographic data is indispensable in education for advancing equity, fostering student achievement, and cultivating inclusive learning environments tailored to the needs of all students.
Urban Development: Urban planners could use Plymouth demographic data to design and create areas that accommodate the needs of residents, including housing, transportation and public services, while promoting sustainability and quality of life. Demographic shifts can contribute to gentrification and neighborhood change in urban or rural areas. As neighborhoods attract new residents with different income levels and lifestyle preferences, property values may rise, leading to displacement of long-time residents and changes in the character and identity of the neighborhood. Understanding population density, age distribution, household size and income levels helps inform decisions related to zoning, transportation infrastructure, housing development and public amenities. Lastly, using Plymouth demographics for planning and development of affordable housing can help prevent displacement.
Understanding Populations: Analyzing and interpreting the Plymouth demographic data provides us with valuable insights into the characteristics and composition of populations, encompassing age, gender, race, ethnicity, income, education and other socio-economic variables. This understanding is crucial for addressing the diverse needs, preferences and challenges encountered by various demographic groups within communities. Demographics play a crucial role in understanding populations, informing decision-making processes, and advancing equity, inclusion, and overall well-being for all individuals and communities. The Plymouth population and demographic data serves as a foundation for addressing social, economic and environmental challenges, while also nurturing the well-being and resilience of societies.
| Race | Plymouth | Wisconsin | National |
| White | 96.12% | 86.21% | 73.35% |
| Black | 1.70% | 6.29% | 12.63% |
| Asian | 0.73% | 2.57% | 5.22% |
| American Indian | 0.00% | 0.89% | 0.82% |
| Native Hawaiian | 0.00% | 0.02% | 0.18% |
| Mixed race | 1.46% | 2.19% | 3.06% |
| Other race | 0.00% | 1.83% | 4.75% |