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We use near-infrared interferometric data coupled with trigonometric parallaxvalues and spectral energy distribution fitting to directly determine stellarradii, effective temperatures, and luminosities for the exoplanet host stars 61Vir, $\rho$ CrB, GJ 176, GJ 614, GJ 649, GJ 876, HD 1461, HD 7924, HD 33564, HD107383, and HD 210702. Three of these targets are M dwarfs. Statisticaluncertainties in the stellar radii and effective temperatures range from 0.5%-- 5% and from 0.2% -- 2%, respectively. For eight of these targets, this workpresents the first directly determined values of radius and temperature; forthe other three, we provide updates to their properties. The stellarfundamental parameters are used to estimate stellar mass and calculate thelocation and extent of each system's circumstellar habitable zone. Two of thesesystems have planets that spend at least parts of their respective orbits inthe system habitable zone: two of GJ 876's four planets and the planet thatorbits HD 33564. We find that our value for GJ 876's stellar radius is morethan 20% larger than previous estimates and frequently used values in theastronomical literature.

Stellar Diameters and Temperatures V. Eleven Newly Characterized Exoplanet Host Stars