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We present the OGLE collection of delta Scuti stars in the Large MagellanicCloud and in its foreground. Our dataset encompasses a total of 15 256 objects,constituting the largest sample of extragalactic delta Sct stars published sofar. In the case of 12 delta Sct pulsators, we detected additional eclipsing orellipsoidal variations in their light curves. These are the first knowncandidates for binary systems containing delta Sct components beyond the MilkyWay. We provide observational parameters for all variables, including pulsationperiods, mean magnitudes, amplitudes, and Fourier coefficients, as well aslong-term light curves in the I- and V-bands collected during the fourth phaseof the OGLE project.  We construct the period-luminosity (PL) diagram, in which fundamental-modeand first-overtone delta Sct stars form two nearly parallel ridges. The latterridge is an extension of the PL relation obeyed by first-overtone classicalCepheids. The slopes of the PL relations for delta Sct variables are steeperthan those for classical Cepheids, indicating that the continuous PL relationfor first-overtone delta Sct variables and Cepheids is non-linear, exhibiting abreak at a period of approximately 0.5 d.  We also report the enhancement of the OGLE collection of Cepheids and RR Lyrstars with newly identified and reclassified objects, including pulsatorscontained in the recently published Gaia DR3 catalog of variable stars. As aby-product, we estimate the contamination rate in the Gaia DR3 catalogs ofCepheids and RR Lyr variables.

The OGLE Collection of Variable Stars. Over 15 000 Delta Scuti Stars in the Large Magellanic Cloud