June is almost here, and income investors may be looking for ASX dividend shares that can provide reliable income through different market conditions.
But which shares could be top buys?
Three that could be among the best for income investors to buy in June are named below. Here's what you need to know about them:

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APA Group (ASX: APA)
The first ASX dividend share to look at is APA Group.
It is one of Australia's most important energy infrastructure businesses. Its network of gas pipelines, processing facilities, storage assets, and energy infrastructure helps move energy around the country.
This gives the company a very different profile from many traditional dividend shares. APA is not relying on shoppers spending more or miners enjoying high commodity prices. A large part of its business is linked to the need for reliable energy infrastructure.
That can make its cash flows more resilient than those of many cyclical companies. It also helps explain why APA has long been popular with income investors.
The market is forecasting a 5.7% dividend yield from APA Group shares in FY 2027.
Telstra Group Ltd (ASX: TLS)
Another ASX dividend share that could be a best buy is Telstra.
The telco giant has become a cleaner and more focused business in recent years. It still owns the country's largest mobile network, and that remains a very powerful asset.
Mobile connectivity is not a discretionary luxury for most households or businesses. Phones, data, networks, and digital services are now essential parts of everyday life.
This gives Telstra an earnings base that can be more defensive than many other sectors. The company also has room to benefit from ongoing demand for mobile data, business connectivity, and network quality.
Brokers are expecting Telstra to pay a 21.5 cents per share fully franked dividend in FY 2027. This represents a forward dividend yield of 4.1%.
Transurban Group (ASX: TCL)
A third ASX dividend share to consider is Transurban.
Transurban owns and operates toll road assets in major cities across Australia and North America. These roads are difficult to replicate and often sit on critical transport corridors.
That matters because traffic volumes can recover over time as populations grow, cities expand, and commuters return to key routes. Toll increases linked to contracts or inflation can also support revenue growth.
The market expects this to underpin a 4.1% dividend yield in FY 2027.