Researchers looked at the proportion of jobless people across the EU's 28 member states that had been out of work for 12 months or more.
Övre Norrland in northern Sweden boasted the best score in the EU with just 14.8 percent of unemployed people looking for work for over a year.
Bucuresti-Ilfov in Romania came second, reporting a share of 15.9 percent, followed by six other regions across Sweden, including Stockholm and the west coast area which includes the country's second largest city, Gothenburg (Västsverige).
At the other end of the scale, Spain sported seven of the regions with the highest long term jobless rates.
The EU average was 49.3 percent in 2014.
Sweden has a number of strategies in place designed to tackle long term unemployment.
The country's employment service, Arbetsförmedlingen, describes unemployment benefits as "career readjustment insurance and not an occupational insurance" and those who are out of work should – in theory – be offered help in drawing up a personal action plan to get them back into work.
Benefit recipients are entitled to compensation payouts for a maximum of 300 days, or 450 days if they are parents.
Håkan Gustavsson, a labour market analyst for Arbetsförmedlingen told The Local on Wednesday that Sweden's success in tackling long term unemployment was thanks to "the long tradition of trying to activate job seekers to a greater extent than in other European countries".
But he added: "We also haven't had the same magnitude of economic crisis as in southern Europe, so it's not the same as in some places like Spain where whole industries have disappeared. So the number of 'structurally unemployed' is lower in Sweden to start off with".
The latest EU statistics reveal that the areas in Sweden with the highest rates of long term unemployment are Sydsverige in southern Sweden (10 percent of unemployed persons) and Norra Mellansverige in the north of the country (8.6 percent).
The overall jobless rate in Sweden in February 2015 was 7.8 percent, the same figure recorded each month since November 2014. Youth unemployment also remained stable albeit at the much higher rate of 22.2 percent, slightly down from 23 percent a year ago.
Last month an OECD report argued that Sweden has weathered the global economic crisis better than most countries but that falling school results, an inflexible labour market, and slow integration of immigrants remained a worry.
In getting to grips with stubbornly high youth unemployment, Sweden should “reduce the gap in employment protection between permanent and temporary contracts and increase flexibility in entry level wages," the report argued.
EU regions with lowest long term unemployment (in percent)
1. Övre Norrland (Sweden) 14.8
2. Bucuresti – Ilfov (Romania) 15.9
3. Mellersta Norrland (Sweden) 16.3
4. Småland med öarna (Sweden) 16.6
5. Västsverige (Sweden) 17.4
6. Stockholm (Sweden) 17.5 6
7. Östra Mellansverige (Sweden) 17.7
8. Norra Mellansverige (Sweden) 18.4
9. Pohjois-ja Itä-Suomi (Finland) 20.9
10. Nordjylland (Denmark) 21.0