Vorragit HuSupin Chaisiripaiboon2563-04-142020-04-142562-12-08Sripatum University Press13: 978-9746554657https://dspace.spu.ac.th/handle/123456789/6636The research objectives of the relationship between the marketing factor that affect the loyalty in online purchase decision of consumer in Bangkok as follow 1. To study the marketing factors of consumers in Bangkok 2. To study loyalty in online purchase decision of consumer in Bangkok 3. To study the relationship between Marketing factors that influence loyalty in online purchase decision of consumer in Bangkok. The sample group that used in this research was general aged between 20 to 50 years, both male and female had that used to buy products online and live in Bangkok area. We collected 400 people from questionnaire and using descriptive statistics Including Frequency, Percentage, Mean and Standard Deviation Including testing hypotheses using inferential statistics Including T-Test statistics and One-Way ANOVA F-Test statistics and the relationship between variables by Pearson Correlation. The results showed that samples are mostly female, were mostly student, educational level graduated in bachelor degree. The relationships between marketing factors are (1) products (2) price (3) marketing promotion (4) product delivery system (5) return policy (6) customer service is found to be related to loyalty in online purchase decision of consumer at the statistical significance at the level of 0.01. Demographic factors such as gender, age, and different occupations doesn’t affect loyalty in online purchase decision of consumer. Which there are not enough observations statistic data that can be concluded that demographic variables and consumer to loyalty in online purchase decision of consumer are linear relationship.enPricesProductsMarketingPromotionsProduct Delivery SystemsReturn PoliciesCustomer ServiceLoyaltyPurchase DecisionArticle