  We present a semi-analytic estimate of the expected yield of single-transit
planets from the Transiting Exoplanet Survey Satellite (TESS). We use the TESS
Candidate Target List 6 (CTL-6) as an input catalog of over 4 million sources.
We predict that from the 200,000 stars selected to be observed with the
high-cadence postage stamps with the highest CTL-6 priority, there will be 241
single-transit events caused by planets detectable at a signal-to-noise ratio
of SNR$\ge7.3$. We find a lower limit of an additional 977 events caused by
single-transit planets in the full frame images (FFI); this is a lower limit
because the CTL-6 is incomplete below a TESS magnitude of $T>12$. Of the
single-transit events from the postage stamps and FFIs, 1091/1218 will have
transit depths deeper than 0.1%, and will thus be amenable for photometric
follow-up from the ground, and 1195/1218 will have radial velocity signals
greater than 1 m/s. We estimate that the periods of 146 single transits will be
constrained to better than 10% using the TESS photometry assuming circular
orbits. We find that the number of planets detected by TESS in the postage
stamps with periods $P>25$ days will be doubled by including single-transiting
planets, while the number of planets with $P>250$ days will be increased by an
order of magnitude. We predict 79 habitable zone planets from single-transits,
with 18 orbiting FGK stars.
