The service is now available in six markets, and the announcement predicted that the expansion will mean potential service to more than 40 percent of USA households by the beginning of the year. Currently available in six markets and now growing up to 100 metro area since it has started.
Meanwhile, Sam's Club rival Costco launched two new delivery options in October, offering a two-day window for almost 500 non-perishable items and same-day delivery of roughly 1,700 products, including fresh groceries, for hundreds of stores.
The company said it would bring that service to every Whole Foods by year's end.
Walmart no longer requires a subscription for ordering the groceries online, unlike Prime now, the only thing is required is a minimum order of $30.
Customers can place their orders via Walmart's dedicated grocery shopping website or the standalone Walmart Grocery app.
Groceries can be delivered to customers as soon as the same day.More news: Prince William just revealed Princess Charlotte's favourite hobby
More news: Introducing "wheelchair accessible" routes in transit navigation
More news: Nike President Trevor Edwards Resigns As Company Looks Into Workplace Behavior Issues
With the help of Walmart's personal shoppers and crowd-sourced delivery services, the retailer will be able to shop for and deliver fresh groceries to the doorsteps of millions of Americans.
If available, the service can be used by going to Walmart.com/grocery or on its Walmart Grocery App.
Walmart shoppers living in major cities around the country will be able to get their groceries delivered to their door by the end of this year, as the retailer expands a service that could give it a leg up in its ongoing battle with e-commerce giant Amazon.
The move will complement Walmart's rollout of curbside grocery pickup, which is now available in 1,200 stores and will be added to a 1,000 more stores this year. It started working with partners like Uber for grocery delivery only in selected market such as Dallas, Denver, Orlando, Phoenix, Tampa and San Jose.
The retailer also offers an Online Grocery Pickup service that allows customers to order their groceries online and pickup them up in stores without ever getting out of their cars. There is a special training provided for these employees for about three-week, to have the basic knowledge related to online orders, that includes learning on how to pick the best product.
"Our commitment goes further than saving customers money", said Tom Ward, Vice President, Digital Operations, Walmart US.