Louis Joseph Maria Beel (12 April 1902 – 11 February 1977) was a Dutch politician of the Roman Catholic State Party (RKSP) and later co-founder of the Catholic People's Party (KVP) and jurist who served as Prime Minister of the Netherlands from 3 July 1946 until 7 August 1948 and from 22 December 1958 until 19 May 1959.

Beel studied Law at the Radboud University Nijmegen obtaining a Master of Laws degree and worked as a civil servant in Eindhoven and for the provincial executive of Overijssel from July 1929 until May 1942 and as a researcher at his alma mater before finishing his thesis and graduating as a Doctor of Law in Administrative law and during World War II worked as a lawyer in Eindhoven from May 1942 until January 1945. Shortly before the end of the War, Beel was appointed as Minister of the Interior in the Gerbrandy III cabinet, the last government-in-exile taking office on 23 February 1945. After a cabinet formation, Beel retained his position in the national unity Schermerhorn–Drees cabinet. After the 1946 general election Beel was asked to lead a new cabinet and following a successful cabinet formation with Labour Leader Willem Drees formed the Beel I cabinet and became Prime Minister of the Netherlands and dual served as Minister of the Interior taking office on 3 July 1946.

After the 1948 general election, Beel failed to achieve a new coalition following a difficult cabinet formation and was elected as a Member of the House of Representatives on 27 July 1948. Beel left office following the installation of the Drees–Van Schaik cabinet on 7 August 1948 and continued to serve in the House of Representatives as a backbencher. In September 1948, Beel was nominated as the next high commissioner of the Dutch East Indies, serving from 29 October 1948 until 18 May 1949 and worked as a professor of administrative law and public administration at his alma mater and the Catholic Economic University from October 1949 until December 1951. Following a cabinet reshuffle he was again appointed as minister of the interior in the Drees I cabinet, taking office on 6 December 1951. After the 1952 general election, Beel continued his office in the Drees II cabinet and also became deputy prime minister, taking office on 2 September 1952. On 7 July 1956 Beel, resigned after his appointment to lead a special commission investigating a political crisis concerning the royal family. In February 1958, Beel was nominated as a Member of the Council of State taking office on 1 April 1958. After the fall of the Drees III cabinet, Beel was asked to lead an interim cabinet until the next election, and following a successful cabinet formation formed the caretaker Beel II cabinet and again became Prime Minister of the Netherlands and dual served as Minister of Social Affairs and Health taking office on 22 December 1958.

Before the 1959 general election, Beel indicated that he would not serve another term as prime minister or not stand for the election. Beel left office a second time following the installation of the De Quay cabinet on 19 May 1959. Beel continued to be active in politics and in July 1959 was nominated as the next vice-president of the Council of State, serving from 1 August 1959 until 1 July 1972.

Beel retired from active politics at 70 and became active in the public sector as a non-profit director and served on several state commissions and councils on behalf of the government. Beel was known for his abilities as an efficient manager and effective consensus builder. Beel was granted the honorary title of minister of state on 21 November 1956 and continued to comment on political affairs as a statesman until he was diagnosed with leukemia in August 1976, dying six months later at the age of 74. He holds the distinction as the only prime minister to have served two non-consecutive terms after World War II and because of his short terms in office his premiership is therefore usually omitted both by scholars and the public in rankings but his legacy as a minister in the 1940s and 50s and later as vice-president of the Council of State continue to this day.

Louis Joseph Maria Beel was born on 12 April 1902 in Roermond, a town with a bishop's see in the province of Limburg, in the very south of the Netherlands. He grew up in a predominantly Roman Catholic community and went to school at the famous Bisschoppelijk College (Diocesan College) of Roermond. He graduated in 1920 and found work as clerk-volunteer at the municipality of Roermond. Two years later he became secretary to the Educational Religious Inspector of the Roermond diocese, Monsignor Petrus van Gils. When in 1923 a Catholic University was founded in Nijmegen (presently known as the Radboud University Nijmegen), Monsignor van Gils insisted on his secretary becoming a part-time law student in Nijmegen. In 1924 Beel began commuting between Roermond and Nijmegen. After obtaining his bachelor's degree in 1925 he found a new job as an administrative assistant in the government of the eastern province of Overijssel. He moved to its capital, the town of Zwolle, and left his place of birth Roermond. During the time he lived in Zwolle, Beel got married and his first child, a son, was born. In addition to being a provincial civil servant, Beel accepted a part-time lectureship at an institute for professional training, Katholieke Leergangen, and he wrote his first articles on legal subjects.

In 1928 Beel obtained his master's degree in law at Radboud University Nijmegen. Subsequently, he applied for a better job, and managed to find one as a clerk at the municipality of Eindhoven, also in the south of the Netherlands at that time a booming city as a result of the establishment of the Philips group. With his wife, his son and his mother-in-law he moved to Eindhoven in 1929 and lived there for more than fifteen years. Three daughters were born there. Beel's professional career progressed rapidly and in less than one year he became a principal clerk. As he had in Zwolle, Beel proved to be an industrious man. He continued his part-time lecturing at the Katholieke Leergangen, he published regularly in the legal press and in 1935 he obtained his doctorate in law at the Radboud University Nijmegen.

At the time of his resignation as a municipal Civil servant in 1942, Beel was Director of Social Affairs and Deputy Town Clerk. Beel resigned because he opposed the German occupation of the Netherlands. To avoid being taken prisoner by the German occupational forces he frequently had to go in hiding. Eindhoven was liberated on 18 September 1944 at the time of the World War II military offensive known as Operation Market Garden. Dutch resistance fighters, massively manifesting themselves immediately after the Germans had gone, saw Beel as one of them. He became the spokesman of a group of prominent citizens in Eindhoven, who had resisted the Germans during the war. The group was not in favour of a continuation of the pre-war political party-lines, with the ever-dominant Anti-Revolutionary Party. In this vein they sent an Address, drafted by Beel, to Queen Wilhelmina, who still resided in London. Beel was urged to accept the function of adviser to the Military Administration (Militair Gezag), the temporary government in the liberated southern part of the Netherlands under Supreme Headquarters Allied Expeditionary Force. In this capacity Beel was invited by the Dutch government-in-exile to travel to London and to advise on dealing with the war victims. He arrived in London on 1 January 1945. On 10 January he visited at her request Queen Wilhelmina in her English mansion Mortimer. This visit gave a decisive turn to Beel's life.