President Trump’s approval rating remains at 50 percent in the counties that propelled his win in the 2016 election, a new poll on Sunday reveals.

The survey of adults in 439 “Trump counties” in 16 states showed half of the adults — Republicans, Democrats and independents — approve of the president’s job performance,​ the NBC News/Wall Street Journal survey say​s.​​

​Of those, 29 percent​ “strongly approve,” while ​of the ​46 percent ​who ​disapprove,​ ​35 ​percent ​​do so “strongly​.”​

The areas were broken down into “surge” or “flip” counties, meaning they either flipped from Barack Obama to Trump or Trump beat Mitt Romney’s totals in 2012.

In the “surge” counties, Trump beat Hillary Clinton by a combined 65 percent-to-29 percent margin, and in the “flip” counties Trump’s margin was 58 percent to 39 percent.

The counties were located in ​16 ​states — Colorado, Florida, Georgia, Indiana, Iowa, Maine, Michigan, Minnesota, Missouri, Nevada, New Hampshire, North Carolina, Ohio, Pennsylvania, Virginia and Wisconsin, according to the survey.

The poll surveyed 600 adults in these counties between July 8 and 12 and has a plus or minus 5.3 percentage-point margin of error in “flip” counties and a plus or minus 6.1 percentage-point margin of error in “surge” counties.