Following the proclamation of the royal dictatorship in 1929, the government began to persecute leftist activists, and Radnički changed its name to Građanski.

[1] At the beginning of World War II in the Kingdom of Yugoslavia in 1941, the club terminated the activities, which were renewed in 1945, one year after the liberation from the occupation of Nazi Germany.

On 23 September 1962, Radnički fans displayed their first big choreography on the first league match against Red Star Belgrade.

In 1975, Radnički beat Turkish club Eskişehirspor (1–0, 2–1) and won its first trophy of European importance, the Balkans Cup.

However, it was a 2–1 victory on aggregate for the Serbian club and in the quarter-finals Radnički were drawn against Dundee United from Scotland.

Although they were not seen as the favourites in the return leg, the Real from Nišava pulled off a convincing 3–0 win in front of its spectators, and with an aggregate score of 3–2 they eventually achieved their greatest success by reaching the semi-finals of this prestigious tournament.

The semi-finals provided a football holiday at Čair Stadium, due to the fact that German top club Hamburger SV, led by stars like Horst Hrubesch, Felix Magath, Lars Bastrup, Manfred Kaltz, Thomas von Heesen and Uli Stein would play in Niš.

After winning matches against St Gallen (3–0, 2–1) and FK Inter Bratislava (4–0, 2–3), Radnički played against Hajduk Split.

During this time, Radnički lost only one UEFA Cup home match of a total of 11 across three seasons and only against a team from the domestic league.

The disintegration of Yugoslavia, the civil war (1992–95), the inflation and the UN sanctions hit all the Yugoslav football teams hard, and also Radnički was no exception.

In the SuperLiga, Radnički finished the season in second place behind defending champions Red Star Belgrade, once again reaching the qualifying rounds for the UEFA Europa League.

The club performed in a green-white jersey and on the left, in the white field, was a red five-pointed star as a symbol of affiliation with the Labour movement, the colour of which was later taken as a frequent kit color of Radnički.

[4] The Čair stadium began undergoing complete reconstruction during the second half of 2011 in an ambitious project by the Football Association of Serbia and the city of Niš.

About 7,000 seats had been initially installed and they were completely filled as Radnički Niš has hosted its first SuperLiga match after 9 years.

Manager Aleksandar Ilić fielded the following squad: Stevan Stefanović, Branislav Vukomanović, Milan Jovanović, Marko Ranđelović, Miloš Perić, Bratislav Pejčić, Aleksandar Jovanović, Dušan Kolarević, Miloš Petrović, Vladan Binić and Strahinja Petrović.

At the threshold of a great football career, he lost his life during training as a result of a lightning strike on the auxiliary field, near the youth school.

In memory of the tragically lost star player, the football schools bears his name to this day.

[8] During 1963, one year after entry of Radnički in the Yugoslav First League, the club formed its own football schools at the initiative of Tihomir Petrović.

Forty-eight players were selected from nine primary schools and began to learn the football alphabet at Radnički.

For the first time, led by coach Vladislav Nikolić, they won the Yugoslav championship, after defeating Željezničar Sarajevo (1–0 at home by a goal from Dejan Petković, 1–1).

Its cadets were Yugoslav champions and repeated the success achieved the previous year, which was a triumph for the managers of the youth school and coaches like Miroslav Glišović, Milorad Janković, Ljubiša Rajković and Miodrag Stefanović.

In that period, Radnički's football school was well known for its youth work, which demonstrated a high level of technical skill, especially recognizable in young players such as Dragan Stojković and Dejan Petković, as well as tactical readiness in combination with adaptability.

[8] The first large organized support happened in 1962 against Vardar, when several thousand fans from Niš travelled to Skoplje.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Since 2000, Radnički Niš has not issued the squad number 10 due to it being retired in memory of Ivan Krstić, who was killed by lightning on 29 May 2000 during training.