If you are running an amateur photoblog you might be interested in this list of 23 Free wordpress photography themes. If you run a business you might be interested in premium photography wordpress themes.
Note: This post is old and some of these themes are no longer available. I've stated which aren't available anymore. I am going to create a new post soon with updated and new themes. Please subscribe to get updates.
F8 Static
Simple, clean grid layout, menu customization, fully widgetized, easy to produce post thumbnails and more.
Mansion
Mansion features a flexible-width thumbnail grid for both images and photo journal entries. This theme is for those who want to primarily showcase their photographs and maybe occasionally write blog posts.
Fullscreen
One-column photography and multimedia theme. Easily present your latest photos using a minimalist side-scrolling homepage. Fully widgetized and of course WordPress 3.0 menu support.
Snapshot
This theme has different layouts and color schemes available. Also backend theme options, auto sizing thumbnails (built-in script), custom page templates and more.
Fotofolio
(No Longer Available) Theme options, easy to use, thumbnail resize, jQuery integrated. Keeps your images in focus using a creative yet professional layout.
Cumulus
(No Longer Available) Clean portfolio-style theme. A large block for featured projects and images and blog posts navigation in the sidebar.
Shaken grid
Gallery/portfolio theme with a unique grid layout. Uses the jQuery Masonry plugin to arranges elements.
Work-a-holic
Two and three column WordPress theme that focuses mainly on showcasing portfolios. Clean grid layout, fully widgetized + +
Selecta
Unique rounded edges. Recommended for video or photo heavy blogs. Footer widget area, featured video slider, threaded comments, full-width page templates.
Brave Zeenat Pro Light
(No Longer Available) Clean & Simple Portfolio style theme. 2 columns, widget ready, adsense ready, jQuery integration+.
Monokrome
(No Longer Available) 960 grid, Flickr integration, widget ready, easy to configure with built in options.
Autofocus +
(No Longer Available) Theme options, optional featured posts, support for video and gallery embedding, optional EXIF data display.
Photo blog
(No Longer Available) Extremely simple and therefor timeless. No fixed width, no widgets.
Tofurious
Simgle column. Widgetized sidebar footer, iPad/Mobile compatible, roll out tags, customizable profile selection ++.
Viewport
Simple, 1 column. Posts display in a timeline. Scrolling timeline, inline loading of posts, pages and YouTube videos and more.
Gallery
jQuery slide hover effect on thumbnails, lazyloading for thumbnails, built-in social media links for all items and more.
Photofeature
Featured slider, many theme options, customizable/widgetized footer.
Photoflash
Same as the previous theme, photofeature, but with a simple flash banner instead of the featured photos slider.
Photolounge
Similar to the previous two (photoflash and photolounge), only simler. No featured section, no flash banner. Clean and simple.
Imbalance
Very stylish theme with own twitter widget, own jquery gallery, many options, jQuery-powered header and more.
Bluebubble
Clean and simple. Several styles/colors, advanced theme options panel, colorbox image pop up, contact form, auto image resixing ++.
the Seven Five
(No Longer Available) Logo customization, custom theme layouts, custom footer text, exclusive widgets.
Hyku
Horizontal scrolling. Meant to feature photos only. Easy to use with Flickr, no comments.
These are the free wordpress themes I could but there might be more out there. If you think you found one that should be on this list please leave it in the comments below.
You might be interested in my post on photography website templates if you aren't running wordpress to power your website.
Again, this post is old and I'm going to create a new post soon with newer updated themes that work with WordPress version 3.7+. Subscribe to get updates.