Atletico CP Lisbon

Atlético Clube de Portugal was formed when two clubs from west Lisbon, Carcavelinhos and União, merged to create a stronger team. The merger was formalised on the night of 18 September 1942, during a grand session held in the Cinema Promotora, owned by the Sociedade Promotora de Educação Popular, in Alcântara.

The early years of Atlético Clube de Portugal were marked by significant success. By combining the talent and resources of two of Lisbon's strongest teams, the club achieved outstanding results in football, basketball, and field hockey.

The club's first title came from the basketball team, which won the 1942/43 Regional Championship of Lisbon. This was the first of five Lisbon Championships won within a decade. The basketball team also won the Cup of Honour (predecessor of the Portuguese Cup) in 1943/44, a 2nd Division title in 1943/44, and a Portuguese Cup in 1953/54.

The rugby section, composed of former students from the Instituto Superior de Agronomia, won two Regional Championships of Lisbon.

In football, the club reached the Portuguese Cup final twice, in 1946 and 1949, although they lost both times. They also secured two podium finishes in the 1st Division and won the 2nd Division title in 1944/45, marking some of the club's greatest achievements.

In 1951, Atlético was awarded the rank of Official of the Military Order of Christ for its cultural and athletic contributions to national sports.

Following its initial success, Atlético entered a period of consolidation. The football team began to feature players from the club's own schools, such as Orlando Paulos, Tomé Antunes, Vítor Lopes, Carlos Gomes, and Germano de Figueiredo. Other notable players included José Henrique, Mario Imbelloni, António Castiglia, Enrique Messiano, and Henrique Ben David. Despite this, the club often found itself mid-table in the 1st Division and was relegated several times, eventually falling to the 2nd Division in 1976/77 and never returning.

In 1972, Atlético inaugurated its multi-sports pavilion. The 1970s and 1980s were marked by achievements in amateur sports, particularly basketball, which produced several generations of talented athletes and won numerous titles. Notable achievements included three National U-19 Championships, two U-17 Championships, and a 2nd Division title with the main team. Atlético became a respected presence in national basketball.

Other sports also benefited from the construction of the Pavilion Engenheiro Santos e Castro, including women's volleyball (which won three Portuguese Cups and was the first team to participate in European competitions) and handball (which won the 2nd Division).

In 1981, Atlético Clube de Portugal was recognised as an Entidade de utilidade pública (public utility entity), a Portuguese form of non-profit association.

Football, the club's main sport, struggled in the 1990s, with no major highlights. Other sports also saw limited success, except for futsal, which won a District Championship and participated in the National Championship finals several times.

In 1992, during the club's 50th-anniversary celebrations, the Lisbon City Council awarded Atlético the Municipal Gold Medal of Merit, and the Government of the Republic awarded it the Medal of Good Sporting Services.

The new millennium brought more titles for Atlético. The senior football team won the 3rd Division twice and was promoted to the 2nd League in 2011. The U-19 team won the Lisbon Honour Division in 2006 and the National Championship of the 2nd Division in 2013. The U-17 team returned to national competitions in 2014 after a 15-year absence.

The basketball youth team won the Under-20 National Cup in 2007. The senior team won the National Championship of the 1st Division in 2013/14, returning the club to Proliga. In the 2015/16 season, Atlético finished second in the Proliga championship and earned the right to compete in the League (LPB), although this right was not exercised, relegating the team back to the National Championship of the 1st Division.

Futsal also saw success, winning the Division of Honour of the Lisbon Football Association in 2012/13 and earning promotion to the 2nd National Division the following season.

Field hockey returned to the club in 2015, winning the National Indoor Hockey Championship in the 2015/16 season.

The triathlon team won three national championships, with Sérgio Marques earning a bronze and a silver medal in European Championships.

The club also resumed water activities, managing the Alvito Municipal Pools since 2009.

After being promoted to the 2nd League, Atlético faced financial challenges. Increased liabilities and regulations from the Portuguese Professional Football League led the club to form a Sociedade Anónima Desportiva (SAD), which was approved by club members at a general meeting in April 2013.

The formation of the SAD in 2013/14 brought new problems, with conflicts arising between the SAD and the club's board. The professional team struggled on the field, facing relegation for three consecutive years, although they were saved by administrative decisions in 2013/14 and 2014/15.

The chairman of the SAD, Xialong Ji, was appointed by Anping Football Limited, owned by Eric Mao. Rumours of match-fixing involving the company, including a UEFA report, strained the relationship between the club and Anping.

In 2016, Armando Hipólito won the club elections and severed ties with the SAD, banning the professional team from using the club's facilities.

Hipólito's tenure was marked by a deep economic crisis. The club lost management of the Alvito Municipal Pools, and the board resigned in April 2017, calling for early elections.

Ricardo Delgado won the subsequent elections and became the president of Atlético Clube de Portugal. In September 2017, the team managed by the SAD was disqualified from the regional championship after missing two consecutive games.

Following the split from the SAD at the conclusion of the 2015–16 season under the Armando Hipólito administration, the club registered a team with the Lisbon Football Association. This team was placed in the 1st Division of the association, effectively taking the spot of the former reserve team of the SAD, which had won the 2nd Division championship in the previous season.

The 2016–17 season proved frustrating, with Atlético missing promotion by four points. Neighbors Santo António de Lisboa secured promotion in a championship won by Mem Martins.

In the 2017–18 season, the club announced its entry into women's football, forming a team to compete in the Division of Promotion and the Cup of Portugal.

The club continues to maintain youth teams ranging from under-10 to under-19.

In the 2021–22 season, Atlético achieved promotion to the Campeonato de Portugal after a four-year absence. In the 2022–23 season, the club made history by earning promotion to Liga 3 for the first time and becoming champions of the Campeonato de Portugal.