June 20 (Reuters) - Australian shares fell for a seventh straight session on Monday to mark their longest losing streak since March 2020, as miners tumbled due to a sell-off in commodities over declining China demand and deepening fears of a global recession.

The S&P/ASX 200 index ended 0.64% lower at 6,433.4, with the country's three top miners losing roughly A$26.06 billion ($18.18 billion) in market value.

Shares of the three mining behemoths - Rio Tinto, BHP and Fortescue - dropped between 5.1% and 8.6%. The mining index tumbled 5.1%, hitting its lowest since Dec. 13 and extending its fall after last week's 7.4% drop.

Energy Stocks slid 5.2% to be among the biggest laggards on falling oil prices, as concerns about slowing global economic growth and fuel demand outweighed worries about tightening supplies.

Heavyweights Woodside Energy Group and Santos declined nearly 5% and 6%, respectively.

Financials, however, climbed 0.55% to break their nine-session losing streak, with the so called "Big Four" banks rising in a range of 0.3% to 1.2%.

Investors are now awaiting the Reserve Bank of Australia minutes due on Tuesday for any interest rate policy cues, said Jeffrey Halley, a senior market analyst at OANDA.

In corporate news, building materials manufacturers Brickworks and Boral are cutting back operations, hiking prices and considering moving production offshore to manage a spike in power and gas bills. Shares of Brickworks closed 0.2% higher, while those of Boral rose 0.75%.

In New Zealand, the benchmark S&P/NZX 50 index closed almost flat 10,588.2. ($1 = 1.4337 Australian dollars) (Reporting By Navya Mittal in Bengaluru; Editing by Subhranshu Sahu)