  We present a Cepheid-based distance to the nearby Seyfert galaxy NGC\,6814
from {\it Hubble Space Telescope} observations. We obtained F555W and F814W
imaging over the course of 12 visits with logarithmic time spacing in 2013
August$-$October. We detected and made photometric measurements for 16,469
unique sources across all images in both filters, from which we identify 90
excellent Cepheid candidates spanning a range of periods of $13-84$ days. We
find evidence for incompleteness in the detection of candidates at periods <21
days. Based on the analysis of Cepheid candidates above the incompleteness
limit, we determine a distance modulus for NGC\,6814 relative to the LMC of
$\mu_{\rm rel\,LMC}=13.200^{+0.031}_{-0.031}$ mag. Adopting the recent
constraint of the distance modulus to the LMC determined by Pietrzynski et al.,
we find $m-M=31.677^{+0.041}_{-0.041}$ which gives a distance of $21.65 \pm
0.41$ Mpc to NGC 6814.
