The 1929 World Table Tennis Championships mixed doubles was the third edition of the mixed doubles championship.^{[1] [2]}

István Kelen and Anna Sipos defeated Laszlo Bellak and Magda Gál in the final by three sets to one.^[3]

	Round of 16									Quarterfinals									Semifinals									Final
		Adrian Haydon Erika Metzger	w/o
		Fred Perry Marjorie Haydon	scr								Haydon Metzger	17	21	17	20
		Laszlo Bellak Magda Gál	21	21	21						Bellak Gál	21	15	21	22
		A.E. Stilwell Reischig	15	15	12															Bellak Gál	21	13	21	11	21
		Zoltán Mechlovits Mária Mednyánszky	21	21	21	21														Mechlovits Mednyánszky	16	21	18	21	16
		Antonín Maleček Marie Masáková	18	10	23	15					Mechlovits Mednyánszky	23	21	21
		Frank Burls Collett	21	15	21	13	17				Flussmann Reitzer	21	18	13
		Paul Flussmann Helly Reitzer	9	21	17	21	21																						Bellak Gál	21	7	13	8
		Sandor Glancz IIona Zádor	21	21	21																								Kelen Sipos	19	21	21	21
			14	12	19						Glancz Zádor	21	4	14	12
		Alfred Liebster Gertrude Wildam	21	21	21						Liebster Wildam	16	21	21	21
		Way Varga	10	7	10															Liebster Wildam	15	16	17
		Erwin Kohn Josefine Kolbe	9	14	23	11														Kelen Sipos	21	21	21
		István Kelen Anna Sipos	21	21	21	21					Kelen Sipos	21	22	21
		Manfred Feher Lili Forbath	15	11	21	26	21				Feher Forbath	10	20	15
		Charles Bull Joan Ingram	21	21	19	24	19

List of World Table Tennis Championships medalists