本文旨在探討臺中市於2010年底改制升格為直轄市後，10年內各區人口分布與成長的概況，主要聚焦於自然增減與社會增減，在各區人口成長所扮演角色之更迭。採用Webb（1963）八種類型分析法，逐區進行統計分類。結果發現：十年間全市人口增加6.51%，淨遷入人口（社會增加），遠大於自然增加人口，人口變動屬於C型。全市有20區（68.97%），屬於人口增加，其中7區屬於B型（東區、清水、梧棲、大雅、龍井、霧峰、大里），8區屬於C型（南區、西屯、南屯、北屯、沙鹿、潭子、烏日、太平），4區屬於A型（豐原、后里、神岡、大肚），D型僅有1區（和平）。然而全市有9區（31.03%）屬人口減少，其中G型有5區（中區、東勢、新社、石岡、大安），H型有4區（西區、北區、大甲、外埔），但未見E、F二型的人口變動。整體而言，都市核心與偏遠地區為本市社會減少（淨遷出）嚴重地區，加以人口結構老化，自然增加有限，甚至為自然減少，故成為G、H二型優占區，人口變動類型較多元；近郊、遠郊二帶則是主要人口淨遷入區，為C型優占區，人口變動類型較單純，全屬人口增加區。

The changes of population growth between 2010 and 2020 in the districts of Taichung City are analyzed in this paper. In order to determine the level of development of suburbanization processes within the subdivision area in this city, the comparison of the main factors of total population growth (natural increase and net migration) are investigated with the use of the Webb's typology. Research was conducted in the period of 2010 to 2020. The results showed that the city's population increased by 6.51% in this period, and the net migration population (social increase) was much greater than the natural increase in population growth, which is referred to as type C in the Webb's typology. In 20 districts (68.97%) of Taichung City, the populations are increased. Among these 20 districts. 7 districts are categorized as type B. and there are 8 districts and 4 districts belonging to type C and type A. respectively. Only 1 district of 20 districts shows type D population growth based on the Webb's method. On the other hand, there are 9 districts (31.03%) in the city with a population decrease. In these 9 districts, 5 districts are type G and 4 districts are type H. (No type E and F of population growth was noted). This study indicates that the urban core and remote areas are the areas with severe social decrease (net emigration) in the city. With the population aging, the natural increase is lower and a natural decrease is even bigger, so the urban core and remote areas become type G and H predominant areas, and the types of population changes are more diverse; the suburb and outer suburbs are the main net immigration areas, which are type C predominant areas, where the type of population change is relatively simple. All the suburb and outer suburbs are population increase areas.

人口成長類型; 自然增加; 社會增加; 淨遷移; 臺中市

Demographic Types; Natural Increase; Social Increase; Net Migration; Taichung