In 1874, he was elected Member of Parliament, succeeding his father, who had held the Newcastle seat as a Liberal since 1865. Joseph Cowen was at that time a strong Radical on domestic questions. He was also a sympathizer with Irish Nationalism, and one who in speech, dress and manner identified himself with the North East mining class. According to Dilke he spoke with a distinctive Tyneside burr. On 13 July 1876, he joined John Bright in introducing Joseph Chamberlain into the Commons as the new MP for Birmingham. Short in stature and uncouth in appearance, his individuality first shocked and then by its earnestness impressed the House of Commons; and his sturdy independence of party ties, combined with a gift of rough but genuine eloquence, rapidly made him one of the best-known public men in the country. He was, moreover, an Imperialist and a Colonial Federationist at a time when Liberalism was tied and bound to the Manchester traditions; and, to the consternation of the official wire-pullers, he vigorously supported Disraeli's foreign policy, and in 1881 opposed the Gladstonian settlement with the Boers. His independence brought him into collision both with the Liberal parliamentary party and with the party organization in Newcastle itself, but Cowen's personal popularity and his remarkable powers as an orator triumphed in his own birthplace, and he was again elected in 1885. Shortly afterwards, however, the 'Blaydon Brick' retired both from parliament and from public life in 1886, professing his disgust at the party intrigues of politics, and devoted himself to conducting his newspaper, the Newcastle Daily Chronicle, and to his private business. In this capacity he exercised a wide influence on local opinion, and the revolt of the Newcastle electorate in later years against "doctrinaire Radicalism" was largely due to his constant preaching of a broader outlook on national affairs. He served as President of the first day of the 1873 Co-operative Congress. Behind the scenes he continued to play a powerful part in forming North-country opinion until his death. His letters were published by his daughter in 1909. A fine bronze statue of Cowen stands in Westgate Road in Newcastle upon Tyne. His name lives on in The Joseph Cowen Lifelong Learning Centre, a Charitable Incorporated Organisation also based in Newcastle upon Tyne, delivering the 'Explore' lecture programme.