https://jurnal.unimed.ac.id/2012/index.php/geo/article/view/64617 https://doi.org/10.24114/jg.v17i2.64617 - (Vol 17, No 2 – 2025) available at http://jurnal.unimed.ac.id/2012/index.php/geo e-issn (2549-7057) & p-issn (2085-8167) Moderate Replacement Fertility | 193 Moderate Replacement Fertility: Tranquility Dimension Variables of Yogyakarta Special Region, Indonesia in 2023 Seri Aryati 1 * 1,2 , Sukamdi 1 , Umi Listyaningsih 1 1 Department of Environmental Geography, Faculty of Geography, Universitas Gadjah Mada, Indonesia 2 Doctoral Student, Geography Science Study Program, Faculty of Geography, Universitas Gadjah Mada, Indonesia. ARTICLE INFO ABSTRACT Article History: Received: March 11, 2025 Revision: July 23, 2025 Accepted: July 28, 2025 This study examines life tranquility in the context of moderate replacement fertility levels in the Special Region of Yogyakarta (DIY) in 2023. The region's diverse social, cultural, and economic characteristics significantly influence fertility trends and family dynamics. Areas like Sleman and Bantul display higher family proportions, reflecting stable fertility levels, while Yogyakarta City faces challenges in maintaining population growth due to lower fertility rates, influenced by urbanization and economic pressures. This urban-rural divide underscores the complex relationship between fertility patterns and socio-economic factors. Despite increasing birth rates in some areas, challenges persist in understanding fertility behaviors, particularly in relation to access to education, healthcare, and family policies. These factors can either support or hinder efforts to achieve sustainable population growth and well-being. This study explores the connections between moderate fertility rates, life tranquility, and socio-economic influences in DIY. It also examines how education, healthcare access, and family planning policies impact family well-being and fertility decisions. The research aims to provide policy solutions to enhance the quality of life for families across the region. By understanding the socio- economic determinants of fertility trends, this study offers insights into urban-rural differences and informs policy design to address fertility changes and promote stable family dynamics. Keywords: Tranquility Fertility Yogyakarta Corresponding Author E-mail: seri.aryati@ugm.ac.id INTRODUCTION This study analyzes the tranquility dimension in the context of moderate replacement fertility levels in the Special Region of Yogyakarta (DIY) in 2023. DIY has diverse social, cultural, and economic characteristics that influence fertility trends and family dynamics in each region. According to the data, areas like Sleman and Bantul show more families, which may reflect more stable or moderate fertility levels. In contrast, regions with a lower proportion of families, such as Yogyakarta City, may face challenges in maintaining population growth if their fertility rates fall below the replacement level. Urbanization, shifting family norms, or economic pressures in urban areas often influence this. However, despite an increase in birth rates in some regions, challenges in understanding fertility patterns persist, especially regarding the factors influencing the tranquility of life, such as access to education, healthcare, and family policies. The tranquility of life, influenced by religiosity, provides access to social facilities, an important issue that needs to be explained in the context of more urbanized regions than rural ones. This study explores the relationship between moderate fertility rates and life tranquility with socio- economic variables in DIY, offering solutions to managing policies that support family well-being more effectively. This research is expected to fill a gap in the literature regarding the relationship between fertility, life tranquility, and public