WASHINGTON — Donald Trump still trails Hillary Clinton in the money race on Long Island, but since he started fundraising seriously in June he has almost caught up in Suffolk County, according to an analysis of new campaign finance filings.

From June through August, Trump, the Republican presidential candidate, raised $758,473 from Nassau and Suffolk residents compared with $1.1 million collected by his Democratic rival Clinton, reports filed Wednesday with the Federal Election Commission show.

At the end of August, Trump had cut Clinton’s fundraising lead in Suffolk County for the past three months to $116,000. In the month of August alone, Trump raised $203,759 from Suffolk residents compared with Clinton’s $263,370.

The tightening in the money race echoes Tuesday’s Siena Poll of likely New York registered voters showing Clinton and Trump, both New Yorkers, tied in the suburbs while Clinton led statewide with a bare majority of 51 percent.

“This is Long Island,” said political strategist Michael Dawidziak, who often works with Republicans. “If Long Island were its own state, we would be very competitive.”

A Newsday/News 12/Siena College survey of Nassau and Suffolk voters shows Trump leading Clinton by 43-39 percent. Trump held a 43-41 percent lead in Nassau and was ahead by 44-37 percent in Suffolk County in a race that includes Libertarian candidate Gary Johnson and Jill Stein of the Green Party

Clinton did outraise Trump in Nassau County in the past three months, taking in $214,940 to Trump’s $85,114.

Nassau County Democratic chairman Jay Jacobs said he thinks Clinton will win his county, but said he wasn’t surprised about Trump’s strength in neighboring Suffolk.

“Suffolk County will be pretty close,” said Jacobs. “Suffolk will go Clinton by a little or Trump by a little.”

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The Long Island fundraising gap between Clinton and Trump could be even narrower if money from small donors of less than $200 were added.

Nationally those contributions account for two thirds of Trump’s funds, but just a quarter of Clinton’s. Small-donor money doesn’t show up by state or county because campaigns must report only names and addresses of contributors of $200 or more.

Both Trump and Clinton held well-publicized Long Island fundraisers in August. But many contributors were from New York City or locations off the island so they don’t show up as donations from Long Island residents.

Still, Trump likely never will raise as much money as Clinton from Long Island or across the state before the election.

Clinton launched her New York fundraising in mid-2015, a year before Trump dropped the idea of self-funding his campaign and began asking for political donations. And Trump has yet to lure contributions from New York City.

Clinton’s fundraising dominance in the past 15 months emerges from an analysis that shows she’s raised more than Trump in 155 Long Island zip codes and in 225 New York City zip codes — including the 12 that have contributed more than $1 million each in the current presidential race.

Trump has raised more than Clinton in 24 Long Island zip codes and nine New York City zip codes.

Since last year, Clinton has raised $3.5 million from Long Islanders and $94.4 million from New Yorkers. Trump has gotten $832,297 from Long Island and $2.7 million statewide.

Libertarian Gary Johnson has raised $19,270 on the island and $156,213 statewide. Green Party candidate Jill Stein reported $6,765 from the island and $49,705 from the state.

With Timothy Healy