  We report near-infrared polarization of the zodiacal light (ZL) measured from
space by the Diffuse Infrared Background Experiment (DIRBE) on board the Cosmic
Background Explorer in photometric bands centered at 1.25, 2.2, and 3.5 $\mu$m.
To constrain the physical properties of interplanetary dust (IPD), we use DIRBE
Weekly Sky Maps to investigate the solar elongation ($\epsilon$), ecliptic
latitude ($\beta$), and wavelength ($\lambda$) dependence of ZL polarization.
We find that the polarization of the ZL varies as a function of $\epsilon$ and
$\beta$, consistent with observed polarization at $\lambda$ = 550 nm. While the
polarization dependence with wavelength at $(\epsilon$, $\beta)=(90^{\circ}$,
$0^{\circ})$ is modest (increasing from 17.7 $\pm$ 0.2% at 1.25 $\mu$m to 21.0
$\pm$ 0.3% at 3.5 $\mu$m), the variation is more pronounced at the North
Ecliptic Pole (23.1 $\pm$ 1.6, 35.1 $\pm$ 2.0 and 39.3 $\pm$ 2.1% at 1.25, 2.2
and 3.5 $\mu$m, respectively). The variation of ZL polarization with wavelength
is not explained by either Rayleigh scattering or by absorptive particles
larger than 10 $\mu$m.
