The phone number of Walmart customer service is 1800-966-6546. However, the support working hours is dissimilar for the entire US region. There are two separate working hours for Central standard time and Pacific standard time. The working hours for Walmart customer service Central standard time is 7:00 am to 11:00 om and the working hours for Walmart standard time is 5:00 am to 9:00 pm. The estimated wait time to connect with a Walmart customer service agent is one minute. More options are available to connect with the Chat support and Email support service agent, visit the Walmart website help section for more information.