"EU net migration continued to decline from the peak in the year ending June 2016 (+189,000) to +87,000 in the year ending March 2018, its lowest level since 2012," the ONS' Migration Statistics Quarterly Report read.
The report went on to say that net migration from all countries worldwide to the United Kingdom was much higher — 271,000 people.
"Our best assessment is that around 270,000 more people came to the UK than left in the year ending March 2018, so long-term net migration has continued to add to the UK population," the report said.
In 2017, UK Prime Minister Theresa May pledged to keep net migration at "sustainable levels."
"It will be clear that we do believe that net migration should be at sustainable levels, and sustainable levels do mean the tens of thousands," she said.
According to the ONS, employment is the main reason for people to migrate to the United Kingdom, with 41 percent of migrants had arrived to either look for a job or to settle into one.